Selasa, 30 April 2024

NASA prepping for mid-May Arctic Circle balloon flights - UPI News

April 30 (UPI) -- NASA officials are planning to launch the space agency's long-duration balloon campaign from Sweden to gather scientific data to assist with several projects starting in mid-May.

The National Aeronautics and Space Administration's balloon program is partnering with the Swedish Space Corporation to launch the balloons capable of operating in near-space some 150,000 feet above the Earth, NASA announced Tuesday.

"Our partnership with the Swedish Space Corporation is valuable to NASA and the scientific community by allowing us to use their high-quality facilities at Esrange," Andrew Hamilton, acting director of NASA's balloon program said Tuesday.

Esrange is located in a large and unpopulated area of Sweden that gets 24 hours of sunlight during the summer months.

Hamilton said high-altitude balloons will not lose gas needed to keep them aloft because of the constant sunlight during the summer months in the polar regions.

"The location of the launch range and the stratospheric winds allow for excellent flight conditions to gather many days of scientific data as the balloons traverse from Sweden to northern Canada," Hamilton explained.

The balloon program has four primary missions this summer.

One mission uses a superconducting magnet to measure the flux of high-energy cosmic ray isotopes to unexplored energies while helping determine the age of the Milky Way galaxy's cosmic rays.

A second mission will use high-resolution imaging equipment to record X-rays from energetic electron microbursts in the polar atmosphere.

The mission requires a balloon measuring 60 million cubic feet to fly higher than 150,000 feet.

A third mission is focused on the Sun and will use high-resolution images to observe spectro-polarimetry of its layers called the solar photosphere, cromosphere and other active regions of the Sun.

The images will help measure temperature, magnetic field and velocities associated with those layers.

The fourth mission will use a telescope to observe the sources of several black holes and neutron stars in the Milky Way to help learn how they accelerate electrons and emit X-rays.

The fourth mission will include two smaller payloads to complete two additional scientific missions.

One will use an infrared channeled spectro-polarimeter to measure the tops of clouds and the size and shape of ice particles that help scientists better understand weather while improving climate models.

Another will help NASA develop sensor technologies that measure ultraviolet UVA, UVB and UVC wavelengths and ozone concentrations.

NASA says its high-altitude balloons can lift up to 8,000 pounds and are quick, cost-effective ways to test, track and recover scientific experiments for NASA and universities located around the world.

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2024-05-01 00:56:39Z
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SpaceX Delivers EU Galileo Navigation Satellites Into Orbit - Aviation Week

CAPE CANAVERAL—With Europe’s Ariane 6 rocket yet to debut, U.S. competitor SpaceX took on the mission of delivering two new members of Europe’s Galileo global navigation satellite system into orbit on April 28.

The European Union last year signed a contract with SpaceX worth nearly $200 million for a pair of Falcon 9 launches, each of which would carry two Galileo spacecraft into orbits about 14,000 mi. above the planet.

The launch marked the first time Galileo satellites have flown from the U.S. All previous missions were launched on Russian-built Soyuz rockets or Europe’s Ariane 5. Neither booster is currently available; the Ariane 5 was retired last year, and Soyuz rocket launches are banned under European trade sanctions stemming from Russia’s invasion of Ukraine in February 2022.

Hours after the SpaceX Falcon 9 lifted off with the Galileo satellites, Ariane 6 manufacturer Arianespace announced that the European Commission and the European Union Agency for the Space Program (EUSPA) had selected its new rocket for a pair of launches to carry the first four next-generation Galileo satellites into orbit in 2026 and 2027. Ariane 6 had already been selected for three missions to complete the first-generation constellation.

“I would like to thank the European Commission and EUSPA for once again demonstrating their trust in Arianespace for the deployment of their satellite-based global navigation system. Ariane 6 is reaching the final milestones leading up to its first flight this summer, which enables us to envisage resumption of deployment of the Galileo constellation from Europe’s spaceport in French Guiana in 2025.

“In this context, the decision by the European Commission and EUSPA is a strong commitment to Europe’s future heavy launcher. Arianespace reaffirms its commitment to guaranteeing reliable and sovereign access to space for Europe,” Arianespace CEO Stephane Israel said in a statement.

Carrying the Galileo satellites, which weigh about 1,543 lb. each, to their intended targets did not leave enough propellant for SpaceX to land the booster’s first stage. So the rocket, which was making its 20th flight—tying the Falcon fleet record—was not recovered.

“The last time a first stage was expended during a Falcon 9 mission was 146 flights ago in November 2022,” SpaceX noted on its website. The company added that it was in the process of qualifying Falcon boosters and payload fairings for up to 40 missions each.

Launch took place at 8:34 p.m. EDT from Kennedy Space Center Launch Complex 39A.

SpaceX’s second mission for the Galileo program is expected this summer.

Galileo is not the only European program that has had to turn to SpaceX for rides. In July 2023, a Falcon 9 carried the European Space Agency’s Euclid telescope into orbit. SpaceX is also on contract to launch Europe’s EarthCARE (Clouds, Aerosols and Radiation Explorer) spacecraft in May and the Hera mission to the asteroid Didymos in October.

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2024-04-30 00:45:00Z
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Senin, 29 April 2024

SpaceX Delivers EU Galileo Navigation Satellites Into Orbit - Aviation Week

SpaceX Delivers EU Galileo Navigation Satellites Into Orbit | Aviation Week Network

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CAPE CANAVERAL—With Europe’s Ariane 6 rocket yet to debut, U.S. competitor SpaceX took on the mission of delivering two new members of Europe’s Galileo global navigation satellite system into orbit on April 28. The European Union last year signed a contract with SpaceX worth nearly $200 million for...

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2024-04-29 22:22:01Z
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SpaceX Delivers EU Galileo Navigation Satellites Into Orbit - Aviation Week

SpaceX Delivers EU Galileo Navigation Satellites Into Orbit | Aviation Week Network

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CAPE CANAVERAL—With Europe’s Ariane 6 rocket yet to debut, U.S. competitor SpaceX took on the mission of delivering two new members of Europe’s Galileo global navigation satellite system into orbit on April 28. The European Union last year signed a contract with SpaceX worth nearly $200 million for...

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SpaceX Delivers EU Galileo Navigation Satellites Into Orbit is published in Aerospace Daily & Defense Report, an Aviation Week Intelligence Network (AWIN) Market Briefing and is included with your AWIN membership.

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Not a member?  Learn how you can access the market intelligence and data you need to stay abreast of what's happening in the aerospace and defense community.

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2024-04-29 22:21:54Z
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SpaceX Falcon 9 booster equals flight record, but no landing this time - Digital Trends

A Falcon 9 booster launches for a record-equalling 20th time.
A Falcon 9 booster launches for a record-equalling 20th time. SpaceX

SpaceX flew a first-stage Falcon 9 booster for the 20th time on Saturday, equalling a record set by another Falcon 9 booster earlier this month.

Reusing parts of the rocket is an integral part of SpaceX’s flight system and has enabled the company to dramatically reduce the cost of launches. Besides the booster, SpaceX also reuses the Falcon 9’s Dragon spacecraft and rocket fairing.

Saturday’s mission lifted off from the Kennedy Space Center in Florida at 8:34 p.m. ET. It launched a satellite for the European Commission’s Galileo global navigation system. However, the mission took the first-stage Falcon 9 booster to a higher-than-usual orbit, preventing the team from bringing it back home for a 20th landing.

The booster first flew in June 2020 and previously launched GPS III-3, Turksat 5A, Transporter-2, Intelsat G-33/G-34, Transporter-6, Intuitive Machines IM-1, and more than a dozen Starlink missions.

Following Saturday’s launch, SpaceX posted a message on social media celebrating the rocket’s achievements over its lifetime. “This Falcon 9 first stage has launched ~200 spacecraft as part of our Rideshare program, supported 13 Starlink missions to help connect people all around the world with high-speed, low-latency internet, sent a lunar lander to the moon, and more. In total, this Falcon delivered 228+ metric tons to Earth orbit and beyond,” it said.

This Falcon 9 first stage has launched ~200 spacecraft as part of our Rideshare program, supported 13 @Starlink missions to help connect people all around the world with high-speed, low-latency internet, sent a lunar lander to the Moon, and more. In total, this Falcon delivered… pic.twitter.com/IDul5eJIum

— SpaceX (@SpaceX) April 28, 2024

SpaceX also expressed thanks for those who had helped to ensure that the booster achieved 20 successful missions, offering congratulations to its team of engineers “for all the science, research, connectivity, and exploration you’ve helped enable with this single Falcon 9 rocket.”

The Elon Musk-led company noted that the last time that a first stage was expended during a Falcon 9 mission was 146 flights ago in November 2022, adding that on most Falcon 9 missions, “enough propellant remains in the first stage after stage separation to enable landing, recovery, and ultimately reuse on future missions.”

It also said that it’s working toward qualifying its fleet of Falcon boosters and fairings to support 40 missions each, explaining that “increasing Falcon’s flight count provides valuable information on repeated reuse, a critical element for making life multiplanetary with Starship,” its next-generation rocket that in March took its third and most successful flight test to date.

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2024-04-29 05:30:11Z
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Japan's space junk cleaner prototype closes in on its target - The Register

Asia In Brief Japan's effort to start a business disposing of space junk is off to a promising start, after the ADRAS-J satellite spotted its first target and sent back images.

Launched in February 2024, ADRAS-J was sent to find an old HII-A rocket body that was used to launch the GOSAT Earth observation satellite and then left in orbit.

Last Thursday, Japan's space agency (JAXA) published an image of the booster captured by ADRAS-J from a range of "several hundred meters."

JAXA's report on the mission states that assumptions about the HII-1A's orientation – assumed to be upright – have been confirmed.

Another hypothesis – that the spent booster would turn brown after time in space – was also confirmed.

ADRAS-J's current activities are Phase 1 of the Commercial Removal of Debris Demonstration (CRD2) project. In Phase 2, scheduled for 2026, JAXA aims to remove debris from orbit – as proof of concept for commercial space junk disposal services.

Sadly, the project relies on automated and/or remote-control equipment: at this time there are no plans for garbage removal jobs in space.

Image of CRD2's target space debris taken by ADRAS-J visible light camera © Astroscale

Image of CRD2's target space debris taken by ADRAS-J visible light camera © Astroscale – Click to enlarge

Chinese smartphone market posts unexpected growth

Strong demand for midrange smartphones in the Lunar New Year period saw China's market for the devices grow – perhaps signaling a recovery.

Analyst firm IDC last week reported that local brands Honor and Huawei enjoyed strong growth, surging to 17.1 percent and 17 percent market share respectively. Oppo went from 19.8 percent market share to 15.7 percent, while gravity hit Apple as its share dipped from 17.8 to 15.6 percent.

The market grew 6.5 percent year over year to 69.3 million units in the first quarter of 2024.

Rival analyst firm Canalys also found strong growth, with 67.7 million shipments, but reported Huawei on top with 17 percent share and Oppo and Honor tied in second place with 16 percent of the market apiece.

Vivo's 10.3 million shipped handsets saw it edge ahead of Apple's ten million, but Canalys rated both as holding 15 percent of the market.

"Honor climbed to the top spot, thanks to its well-rounded product portfolio and the Magic 6 series which came with popular AI features," explained Arthur Guo, IDC China senior research analyst in Client System Research. "Meanwhile, Huawei made a strong comeback and achieved a tie with Honor, though supply constraints will still be a pain point. Apple's price promotions in the quarter were unable to mitigate the impact of the intense competition from Android players."

Canalys senior analyst Toby Zhu suggested Huawei's performance means its HarmonyOS has become the "third OS for smartphones and other edge computing devices, breaking the two-horse race of Android and iOS in Mainland China."

North Korea cybers the South

South Korea's national police last week warned that North Korean attackers targeted defense companies with the aim of stealing information about their tech.

North Korea's cyber operatives – including the notorious Kimsuky gang – also left some malware behind as they rummaged through servers.

National police warned the attacks will continue.

China sets new IPv6 goals

The Cyberspace Administration of China has set new goals for IPv6 adoption.

By the end of 2024, the Administration wants 800 million active IPv6 users and 650 million Internet of Things connections using the protocol.

Targets call for 23 percent of fixed network traffic to be IPv6 by year's end, plus 65 percent of mobile traffic.

Beijing wants more IPv6 home routers, and for government departments to upgrade to the protocol as they upgrade networks.

Also on the agenda is participation in standards groups to develop "IPv6+" and other innovations.

Malaysia dangles golden visa for VCs

Malaysia last week announced a "golden pass" to attract venture capital and tech leaders to the country. The visa reduces registration time from six weeks to two, if approved. "Together with the other agencies, we are also happy to connect VC firms with the local community, and potentially identify partners in their foray to tap into Malaysian and regional opportunities," enthused securities commission chairman Dato' Seri Dr Awang Adek Hussin, speaking at KL20 Summit last Monday.

– Laura Dobberstein

APAC Dealbook

Recent alliances and deals spotted by The Register across the region last week include:

  • Australian telco Telstra struck a five-year deal with professional services outfit Cognizant, which will become "a strategic partner for our software engineering and IT function." Telstra said Cognizant will "help us build our modern software engineering capability."
  • OceanBase, a database vendor that sits within Alibaba's Ant Group fintech arm, scored a win at Chinese autonomous driving systems vendor Haomo.ai.
  • Australian datacenter provider Firmus Technologies last week launched "Sustainable Metal Cloud" (SMC) – a GPU-centric hyperscaler that already operates 1,200 Nvidia H100 GPUs in Singapore, and plans to expand that to 5,000, before expanding into India, Thailand, Australia and Europe in partnership with ST Telemedia. SMC claims its datacenter operation methodology and practices enable it to use around half the electricity consumed by generalist hyperscalers, potentially reducing the cost of running AI workloads by 70 percent.
  • Real-time payments provider Volt launched a one-click payment solution for retail customers in Australia. According to a statement, the feature integrates with PayTo and allows retailers to receive payments instantly. ®

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2024-04-29 00:59:00Z
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Minggu, 28 April 2024

The sun is super active right now. Here's how it can affect electronics on Earth - PBS NewsHour

To most people, the sun is a steady, never-changing source of heat and light. But to scientists, it’s a dynamic star, constantly in flux, sending energy out into space. Experts say the sun is now in its most active period in two decades, causing potential disruptions to radio and satellite communications. John Yang speaks with Bill Murtagh of NOAA’s Space Weather Prediction Center to learn more.

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2024-04-28 21:35:53Z
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SpaceX launches 23 Starlink satellites from Florida - Space.com

SpaceX launched 23 more of its Starlink internet satellites to orbit on Sunday evening (April 28).

The Starlink spacecraft lifted off atop a Falcon 9 rocket from Florida's Cape Canaveral Space Force Station at 6:08 p.m. EDT (2208 GMT). 

Related: Starlink satellite train: How to see and track it in the night sky

The first stage of a SpaceX Falcon 9 rocket is seen after landing on the droneship "Just Read the Instructions" in the Atlantic Ocean on Sunday, April 28, 2024.

The first stage of a SpaceX Falcon 9 rocket is seen after landing on the droneship "Just Read the Instructions" in the Atlantic Ocean on Sunday, April 28, 2024. (Image credit: SpaceX via X)

To plan, the Falcon 9's first stage came back to Earth for a vertical landing about 8.5 minutes after launch. It touched down on the droneship Just Read the Instructions, which was stationed in the Atlantic Ocean.

It was the 13th launch and landing for the booster, according to a SpaceX mission description. Half of the rocket's previous 12 flights were Starlink missions.

The Falcon 9's upper stage, meanwhile, is set to deploy the 23 Starlink satellites in low Earth orbit (LEO) about 65 minutes after liftoff.

RELATED STORIES:

Sunday's launch was part of a busy weekend for SpaceX. The company launched two of Europe's Galileo navigation satellites on Saturday (April 27). The liftoff was the 20th for that Falcon 9's first stage, tying a SpaceX reuse record.

SpaceX's 30th robotic Dragon cargo mission to the International Space Station for NASA was wrapping up on Sunday as well. The company's Dragon capsule departed the orbiting lab at around 1:10 p.m. EDT (1710 GMT), bringing scientific samples and experiments down to Earth. 

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2024-04-28 22:27:08Z
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Sabtu, 27 April 2024

New study on T. Rex casts doubt 2023 research suggesting high intelligence | CTV News - CTV News Edmonton

Science recently proposed a truly horrifying thought — that T. Rex, perhaps the most fearsome predator to walk the earth, was also smart enough to use tools, hunt in packs and pass down knowledge.

Yikes.

But a new paper throws cold water on those dinosaur fever dreams.

"They were very bold claims that needed a second look," said Cristian Gutierrez, a University of Alberta neuroscientist and co-author of a paper in The Anatomical Record that takes a skeptical view of the intelligent Tyrannosaurus theory.

Suzana Herculano-Houzel of Vanderbilt University published research in 2023 that took data on the number of neurons in the brains of evolutionary descendants of some dinosaurs, such as modern birds, reptiles and turtles, and applied them to the fossilized brain cases of ancient lizards.

In the Journal of Comparative Neurology, she concluded T. Rex had somewhere between two and three billion neurons — equivalent to those in the brains of intelligent primates, such as baboons.

"(That) would make these animals not only giant but also long-lived and endowed with flexible cognition and thus even more magnificent predators than previously thought," she wrote.

Uh, no, said Gutierrez.

He writes that Herculano significantly overestimated the size of the actual brain inside T. Rex skulls, which were much more closely related to modern crocodiles than birds. Croc brain cases contain a significant amount of fluid and non-brain tissue, with as little as 30 per cent given over to grey matter.

As well, bird brains are much more neuron-dense than reptile brains, further contradicting Herculano's comparison.

Then there's body size. Even if a T. Rex brain held as many neurons as a baboon's or a magpie's, that brain had a lot more body to operate.

"It's clear larger animals need more neurons," Gutierrez said.

"A T. Rex had, let's say, two billion neurons — about the same as a baboon. But the T. Rex weighed seven tonnes and the baboon weighs 40 kilos.

"It's not the same, right?"

And besides, he said, more neurons don't necessarily mean more intelligence.

Giraffes have about two billion neurons but aren't known to use tools or pass down culture. Magpies, on the other hand, only have about 400 million neurons but play games and hold "funerals" for their dead.

Herculano did not immediately respond to a request for comment on Gutierrez's paper, which has been available since April 3.

Gutierrez said his previous research has shown that there are correlations between behaviour, brain size and the size of different parts of the brain.

"They're not always straightforward correlations, but there are correlations. It's not completely crazy to look at the shape of the brain of the T. Rex."

He said dinosaurs more closely related to birds, such as the Jurassic-era archaeopteryx, had larger brains and may have had more complex, birdlike behaviour.

Fossils do provide some indications of how dinosaurs lived. They can show dinos tended their young and lived in groups, for example.

"But it's always going to be limited," Gutierrez said. "That's the one thing that isn't going to be fossilized — behaviour."

An intelligent T. Rex is highly unlikely, Gutierrez said. Tyrannosaurs probably had smarts closer to those of a crocodile than a primate, so rest easy.

If the thought of a seven-tonne crocodile lets you rest easy.

This report by The Canadian Press was first published April 26, 2024 

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2024-04-27 18:42:23Z
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Are there Spiders on Mars? ESA unveils truth behind the mysterious clusters seen on the red planet | Mint - Mint

The European Space Age (ESA) recently shared pictures of the mysterious spider-like clusters on the planet Mars. The space agency has, however, clarified that these spider like dark features on the Red Planet form “when spring sunshine falls on layers of carbon dioxide deposited over the dark winter months." 

“The sunlight causes carbon dioxide ice at the bottom of the layer to turn into gas, which subsequently builds up and breaks through slabs of overlying ice. The gas bursts free in martian springtime, dragging dark material up to the surface as it goes and shattering layers of ice up to a metre thick," ESA explained.

Further explaining, ESA added, “The emerging gas, laden with dark dust, shoots up through cracks in the ice in the form of tall fountains or geysers, before falling back down and settling on the surface. This creates dark spots of between 45 m and 1 km across. This same process creates characteristic ‘spider-shaped’ patterns etched beneath the ice."

According to the ESA, these dark spots were observed by ESA's Mars Express on the outskirts of a region nicknamed as "Inca City" in the southern polar region of the red planet. NASA's Mariner 9 probe discovered Inca City in 1972. Speaking on the formation of the city, ESA has stated that they are uncertain about the exact formation process of the city but added several possibilities that it could be due to sand dunes or materials such as magma or sand might be seeping through fractured Martian rock with some possibilities associated with glaciers.

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Published: 27 Apr 2024, 09:23 AM IST

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2024-04-27 03:53:58Z
CBMimwFodHRwczovL3d3dy5saXZlbWludC5jb20vc2NpZW5jZS9uZXdzL2FyZS10aGVyZS1zcGlkZXJzLW9uLW1hcnMtZXNhLXVudmVpbHMtdHJ1dGgtYmVoaW5kLXRoZS1teXN0ZXJpb3VzLWNsdXN0ZXJzLXNlZW4tb24tdGhlLXJlZC1wbGFuZXQtMTE3MTQxODc2MjI5NjQuaHRtbNIBnwFodHRwczovL3d3dy5saXZlbWludC5jb20vc2NpZW5jZS9uZXdzL2FyZS10aGVyZS1zcGlkZXJzLW9uLW1hcnMtZXNhLXVudmVpbHMtdHJ1dGgtYmVoaW5kLXRoZS1teXN0ZXJpb3VzLWNsdXN0ZXJzLXNlZW4tb24tdGhlLXJlZC1wbGFuZXQvYW1wLTExNzE0MTg3NjIyOTY0Lmh0bWw

Jumat, 26 April 2024

April 27: Tiny black holes that could smash through our planet, and more… - CBC.ca

Quirks and Quarks54:00Tiny black holes that could smash through our planet, and more…


On this week's episode of Quirks & Quarks with Bob McDonald:

Chimpanzees are being forced to eat bat feces, and the viruses in it

Quirks and Quarks7:29Chimpanzees are being forced to eat bat feces, and the viruses in it

Researchers in Uganda have noticed a new behaviour in the wild chimps they study. The apes are browsing on bat guano, apparently to access the nutrients it contains, as their normal source for these nutrients has been destroyed by humans. Since bats are carriers of a range of diseases, from Ebola to coronaviruses, this may be a new way these diseases could spread. The study was published in Communications Biology. Tony Goldberg, a professor of epidemiology at the school of veterinary medicine at the University of Wisconsin-Madison, was part of the team.

Controversial methods are working to buy Canada's caribou some time

Quirks and Quarks8:34Controversial methods are working to buy Canada’s caribou some time

Woodland caribou have been in steady decline for decades, as logging, oil and gas exploration and other disturbances compromise their western mountain habitat. Steady progress has been made to restore habitat in order to save these caribou, but since these forests will take half a century to regrow, conservationists are trying a variety of interim actions to buy the caribou some time. A new study led by Clayton Lamb from the University of British Columbia Okanagan found that these methods, including direct feeding, maternal penning, and, controversially, culling predatory wolves, have helped caribou recover to some extent, but restoration of their habitat will be necessary for full recovery. The research was published in the journal Ecological Applications.

A young caribou stares at the camera. Tiny antlers are seen budding off its head.
In a new study, researchers found that there are about 1,500 more caribou today than there would’ve been without actions such as wolf culling and maternal penning. (Cory DeStein)

Giant ancient Pacific salmon had tusks sticking out of its face

Quirks and Quarks8:41Giant ancient Pacific salmon had tusks sticking out of its face

Millions of years ago, enormous three metre-long salmon inhabited the seas of the Pacific coast. Named Oncorhynchus rastrosus, this ancient giant was first described in the 1970s as having long front fangs, which led to it being known colloquially as a "saber-toothed salmon." But a new study published in PLOS ONE sets the record straight: the teeth actually protruded out to the sides from the fish's upper jaw, as tusks do. Lead study author and Philadelphia College of Osteopathic Medicine professor Kerin Claeson says despite their menacing look, the salmon did not hunt with these tusks, since these strange fish were filter feeders.

Illustrations of a salmon against a black background
New analysis of five million-year-old salmon fossil, left, revealed that Oncorhynchus rastrosus had tusk-like teeth sticking out the sides of its upper jaw - and not fangs, as previously thought. (Claeson et al./PLOS ONE)

The Gulf oil spill may have had ecological impacts we haven't seen yet

Quirks and Quarks9:00The Gulf oil spill may have had ecological impacts we haven’t seen yet

Fourteen years ago, an explosion destroyed the Deepwater Horizon oil rig and kicked off the largest oil spill in history. While commercial fisheries have largely recovered from the disaster, there are signs that rarer and more vulnerable species might have been devastated. Prosanta Chakrabarty from Louisiana State University surveyed deep sea fish catalogued in museum collections around the world, and found that out of 78 endemic species found only in the Gulf, 29 of them haven't been spotted in the years since the spill. The research was published in the Biodiversity Data Journal.

A man stands in a room lined with shelves which are filled with glass jars. He is looking at a jar in his hands containing a strange sea creature.
In a new paper, Prosanta Chakrabarty looked for fish species endemic to the Gulf of Mexico in museum collections, and found that out of 78 endemic species found only in the Gulf, 29 of them haven’t been documented in the years since the 2010 Deepwater Horizon oil spill. (Eddy Perez, LSU)

Primordial black holes may be the solution the problem of missing dark matter

Quirks and Quarks17:46Primordial black holes may be the solution the problem of missing dark matter

The hunt for exotic black holes that Stephen Hawking first predicted back in the 1970s is now well underway. Primordial black holes behave just like any other black hole, but they would have formed in the early universe and could be any size. Many scientists are particularly interested in the primordial black holes that are the size of an atom and have the mass of an asteroid, because researchers suspect these tiny black holes could be the answer for the missing dark matter in our universe. 

If these tiny primordial black holes exist, Matt Caplan — a physicist from Illinois State University — said there could be one passing through our solar system right now. He predicted in a paper published in the journal Monthly Notices of the Royal Astronomical Society that if these tiny black holes exist, we might be able to see if one has ever smashed through the Moon by studying its impact craters. That's something he hopes to do when we have the technical means to obtain higher-resolution images of the Moon's surface than what's currently available. 

In a new study in that same journal, some physicists from Belgium think that if these tiny primordial black holes exist, they might be able to find them in ultra-faint dwarf galaxies. Nicolas Esser, a PhD candidate at the French Free University of Brussels, says he hopes to find signs of them in these galaxies by looking for a lack of large stars that these black holes would have eaten from the inside out.

Two black holes are shown next to each other over a brownish black backdrop of space.
The violent merger between two black holes that led to the first detection of gravitational waves on Earth opened the door to the existence of primordial black holes. The black holes were of a size not readily explained outside of creation at the time of the big bang. (Simulating eXtreme Spacetimes (SXS) project)

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2024-04-26 22:10:41Z
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Scientists Discover Giant, Prehistoric Salmon With Tusk-Like Teeth - SciTechDaily

Oncorhynchus rastrosus

Oncorhynchus rastrosus. (A) CT model of Holotype, UO F-26799, skull in right lateral view with a stylized drawing of the originally proposed “sabertoothed” position of the isolated premaxilla; (B) UO_A in anterior view of skull, prior to complete preparation and CT scan; (C) Artist’s rendering skull of male iconic fish with accurate spike-tooth configuration; (D) Artist’s rendering of complete female iconic fish with accurate spike-tooth configuration. Scale bar blocks = 1 cm each. Credit: Claeson et al., 2024, PLOS ONE, CC-BY 4.0

Paleontologists suggest that the teeth could have served purposes such as defense, competitive combat, or as tools for digging.

Oncorhynchus rastrosus, a giant species of salmon that lived in the North American Pacific Northwest a few million years ago, sported a pair of front teeth that projected out from the sides of its mouth like tusks, according to a study recently published in the open-access journal PLOS ONE by Kerin Claeson from the Philadelphia College of Osteopathic Medicine, USA, and colleagues.

O. rastrosus, first described in the 1970s, has been estimated to reach up to 2.7 meters (8.9 feet) long, making it the largest member of the Salmonidae family ever discovered. Initially, researchers thought its oversized front teeth pointed backward into the mouth like fangs, in large part because fossils of the teeth were found apart from the rest of the skull.

This led to the common name “saber-toothed salmon.” But through new CT scans and analysis of various Oncorhynchus rastrosus fossils collected over the years, researchers have now been able to confirm that the teeth actually pointed sideways out of the fish’s mouth, similar to a warthog. As a result, the authors say, the species should be renamed the “spike-toothed salmon.”

Comparative Size of the Spike Tooth Salmon to the Largest Living Salmon and a 6ft Fisherman

Comparative size of the Spike-Tooth Salmon to the largest living salmon and a 6ft. fisherman. Credit: Ray Troll, CC-BY 4.0

Potential Uses for Distinctive Teeth

While it’s unclear exactly what these teeth may have been used for, the researchers believe they were likely used for fighting — either against other spiked-toothed salmon or as a defense against predators — or as a tool for digging out nests. It’s also possible the teeth were used for multiple purposes, the authors note. But the teeth likely weren’t used for catching prey, since Oncorhynchus rastrosus is believed to have been a filter-feeder that dined on plankton.

Kerin Claeson, lead author and professor of anatomy at Philadelphia College of Osteopathic Medicine, adds: “We have known for decades that these extinct salmon from Central Oregon were the largest to ever live. Discoveries like ours show they probably weren’t gentle giants. These massive spikes at the tip of their snouts would have been useful to defend against predators, compete against other salmon, and ultimately build the nests where they would incubate their eggs.”

Edward Davis, associate professor of earth sciences at the University of Oregon and director of Condon Collection at the UO’s Museum of Natural and Cultural History, adds: “I’m delighted that we have been able to put a new face on the giant spike-tooth salmon, bringing knowledge from the field in Oregon to the world.”

Brian Sidlauskas, professor and curator of fishes at Oregon State University, adds: “We also stress that females and males alike possessed the enormous, tusk-like teeth. Therefore, the sexes were equally fearsome.”

Reference: “From sabers to spikes: A newfangled reconstruction of the ancient, giant, sexually dimorphic Pacific salmon, †Oncorhynchus rastrosus (SALMONINAE: SALMONINI)” by Kerin M. Claeson, Brian L. Sidlauskas, Ray Troll, Zabrina M. Prescott and Edward B. Davis, 24 April 2024, PLOS ONE.
DOI: 10.1371/journal.pone.0300252

This work was supported by the National Science Foundation (1948340 and 2228394, awarded to ED).

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Kamis, 25 April 2024

NASA astronauts arrive for Boeing's first human spaceflight - Business News - Castanet.net

The two NASA astronauts assigned to Boeing’s first human spaceflight arrived at their launch site Thursday, just over a week before their scheduled liftoff.

Butch Wilmore and Suni Williams will serve as test pilots for Boeing’s Starliner capsule, which is making its debut with crew after years of delay. They flew from Houston into Kennedy Space Center on Thursday.

Due to blast off May 6 atop an Atlas rocket, the Starliner will fly to the International Space Station for a weeklong shakedown cruise. Boeing is trying to catch up to SpaceX, which has been launching astronauts for NASA since 2020.

No one was aboard Boeing's two previous Starliner test flights. The first, in 2019, didn't make it to the space station because of software and other problems. Boeing repeated the demo in 2022. More recently, the capsule was plagued by parachute issues and flammable tape that had to be removed.

Wilmore stressed this is a test flight meant to uncover anything amiss.

“Do we expect it to go perfectly? This is the first human flight of the spacecraft," he told reporters. “I'm sure we'll find things out. That's why we do this.”

NASA hired SpaceX and Boeing a decade ago, paying billions of dollars for the companies to ferry astronauts to and from the space station. The space agency is still keen on having capsules from two competing companies for its astronauts, even with the space station winding down by 2030.

“That's vitally important,” Wilmore noted.

Wilmore and Williams will be the first astronauts to ride an Atlas rocket since NASA's Project Mercury in the early 1960s.

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2024-04-25 23:43:00Z
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Little Dumbbell Nebula may be hiding evidence of stellar cannibalism in new Hubble image - Crossroads Today

(CNN) — The Hubble Space Telescope has captured a stunning new image of the glowing gas ejected from a dying star, which in this case happens to resemble a “cosmic dumbbell.”

The portrait may also include evidence that the star gobbled up another star, in a form of stellar cannibalism, before it collapsed.

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2024-04-25 14:35:31Z
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Rabu, 24 April 2024

Giant prehistoric salmon had tusk-like teeth for defence, building nests: study - CP24


Brenna Owen, The Canadian Press
Published Wednesday, April 24, 2024 7:27PM EDT
Last Updated Wednesday, April 24, 2024 7:27PM EDT

The artwork and publicity materials showcasing a giant salmon that lived five million years ago were ready to go to promote a new exhibit, when the discovery of two fossilized skulls immediately changed what researchers knew about the fish.

Initial fossil discoveries of the 2.7-metre-long salmon in Oregon in the 1970s were incomplete and had led researchers to mistakenly suggest the fish had fang-like teeth.

It was dubbed the “sabre-toothed salmon” and became a kind of mascot for the Museum of Natural and Cultural History at the University of Oregon, says researcher Edward Davis.

But then came discovery of two skulls in 2014.

Davis, a member of the team that found the skulls, says it wasn't until they got back to the lab that he realized the significance of the discovery that has led to the renaming of the fish in a new, peer-reviewed study.

“There were these two skulls staring at me with sideways teeth,” says Davis, an associate professor in the department of earth sciences at the university.

In that position, the tusk-like teeth could not have been used for biting, he says.

“That was definitely a surprising moment,” says Davis, who serves as director of the Condon Fossil Collection at the university's Museum of Natural and Cultural History.

“I realized that all of the artwork and all of the publicity materials and bumper stickers and buttons and T-shirts we had just made two months prior, for the new exhibit, were all out of date,” he says with a laugh.

Davis is co-author of the new study in the journal PLOS One, which renames the giant fish the “spike-toothed salmon.”

It says the salmon used the tusk-like spikes for building nests to spawn, and as defence mechanisms against predators and other salmon.

The salmon lived about five million years ago at a time when Earth was transitioning from warmer to relatively cooler conditions, Davis says.

It's hard to know exactly why the relatives of today's sockeye went extinct, but Davis says the cooler conditions would have affected the productivity of the Pacific Ocean and the amount of rain feeding rivers that served as their spawning areas.

Another co-author, Brian Sidlauskas, says a fish the size of the spike-toothed salmon must have been targeted by predators such as killer whales or sharks.

“I like to think … it's almost like a sledgehammer, these salmon swinging their head back and forth in order to fend off things that might want to feast on them,” he says.

Sidlauskas says analysis by the lead author of the paper, Kerin Claeson, found both male and female salmon had the “multi-functional” spike-tooth feature.

“That's part of our reason for hypothesizing that this tooth is multi-functional … It could easily be for digging out nests,” he says.

“Think about how big the (nest) would have to be for an animal of this size, and then carving it out in what's probably pretty shallow water; and so having an extra digging tool attached to your head could be really useful.”

Sidlauskas says the giant salmon help researchers understand the boundaries of what's possible with the evolution of salmon, but they also capture the human imagination and a sense of wonder about what's possible on Earth.

“I think it helps us value a little more what we do still have, or I hope that it does. That animal is no longer with us, but it is a product of the same biosphere that sustains us.”

This report by The Canadian Press was first published April 24, 2024.

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2024-04-24 23:27:18Z
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SpaceX launch marks 300th successful booster landing - Phys.org

Starlink
Credit: Unsplash/CC0 Public Domain

SpaceX sent up the 30th launch from the Space Coast for the year on the evening of April 23, a mission that also featured the company's 300th successful booster recovery.

A Falcon 9 rocket carrying 23 of SpaceX's Starlink internet satellites blasted off at 6:17 p.m. Eastern time from Cape Canaveral Space Force Station's Space Launch Complex 40.

The first-stage booster set a milestone of the 300th time a Falcon 9 or Falcon Heavy booster made a successful recovery landing, and the 270th time SpaceX has reflown a booster.

This particular booster made its ninth trip to space, a resume that includes one human spaceflight, Crew-6. It made its latest recovery landing downrange on the droneship Just Read the Instructions in the Atlantic Ocean.

The company's first successful booster recovery came in December 2015, and it has not had a failed booster landing since February 2021.

The current record holder for flights flew 11 days ago making its 20th trip off the .

SpaceX has been responsible for all but two of the launches this year from either Kennedy Space Center or Cape Canaveral with United Launch Alliance having launched the other two.

SpaceX could knock out more launches before the end of the month, putting the Space Coast on pace to hit more than 90 by the end of the year, but the rate of launches by SpaceX is also set to pick up for the remainder of the year with some turnaround times at the Cape's SLC-40 coming in less than three days.

That could amp up frequency so the Space Coast could surpass 100 launches before the end of the year, with the majority coming from SpaceX. It hosted 72 launches in 2023.

More launches from ULA are on tap as well, though, including the May 6 launch atop an Atlas V rocket of the Boeing CST-100 Starliner with a pair of NASA astronauts to the International Space Station.

ULA is also preparing for the second launch ever of its new Vulcan Centaur rocket, which recently received its second Blue Origin BE-4 engine and is just waiting on the payload, Sierra Space's Dream Chaser spacecraft, to make its way to the Space Coast.

Blue Origin has its own it wants to launch this year as well, with New Glenn making its debut as early as September, according to SLD 45's range manifest.

2024 Orlando Sentinel. Distributed by Tribune Content Agency, LLC.

Citation: SpaceX launch marks 300th successful booster landing (2024, April 24) retrieved 24 April 2024 from https://phys.org/news/2024-04-spacex-300th-successful-booster.html

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2024-04-24 15:30:01Z
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NASA Celebrates As 1977's Voyager 1 Phones Home At Last - Forbes

Voyager 1 has finally returned usable data to NASA from outside the solar system after five months offline.

Launched in 1977 and now in its 46th year, the probe has been suffering from communication issues since November 14. The same thing also happened in 2022. However, this week, NASA said that engineers were finally able to get usable data about the health and status of its onboard engineering systems.

Slow Work

Fixing Voyager 1 has been slow work. It’s currently over 15 billion miles (24 billion kilometers) from Earth, which means a radio message takes about 22.5 hours to reach it—and the same again to receive an answer.

The problem appears to have been its flight data subsystem, one of one of the spacecraft’s three onboard computers. Its job is to package the science and engineering data before it’s sent to Earth. Since the computer chip that stores its memory and some of its code is broken, engineers had to re-insert that code into a new location.

Next up for engineers at NASA’s Jet Propulsion Laboratory in California is to adjust other parts of the FDS software so Voyager 1 can return to sending science data.

Beyond The ‘Heliopause’

The longest-running and most distant spacecraft in history, Voyager 1, was launched on September 5, 1977, while its twin spacecraft, Voyager 2, was launched a little earlier on August 20, 1977. Voyager 2—now 12 billion miles away and traveling more slowly—continues to operate normally.

Both are now beyond what astronomers call the heliopause—a protective bubble of particles and magnetic fields created by the sun, which is thought to represent the sun’s farthest influence. Voyager 1 got to the heliopause in 2012 and Voyager 2 in 2018.

Pale Blue Dot

Since their launch from Cape Canaveral, Florida, aboard Titan-Centaur rockets, Voyager 1 and Voyager 2 have had glittering careers. Both photographed Jupiter and Saturn in 1979 and 1980 before going their separate ways. Voyager 1 could have visited Pluto, but that was sacrificed so scientists could get images of Saturn’s moon, Titan, a maneuver that made it impossible for it to reach any other body in the solar system. Meanwhile, Voyager 2 took slingshots around the planets to also image Uranus in 1986 and Neptune in 1989—the only spacecraft ever to image the two outer planets.

On February 14, 1990, when 3.7 billion miles from Earth, Voyager 1 turned its cameras back towards the sun and took an image that included our planet as “a mote of dust suspended in a sunbeam.” Known as the “Pale Blue Dot,” it’s one of the most famous photos ever taken. It was remastered in 2019.

Wishing you clear skies and wide eyes.

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2024-04-24 11:14:52Z
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SpaceX launches 23 Starlink satellites, aces 300th rocket landing (photos) - Space.com

SpaceX notched yet another rocket-reuse milestone this evening (April 23).

A Falcon 9 rocket topped with 23 of SpaceX's Starlink internet satellites lifted off from Florida's Cape Canaveral Space Force Station today at 6:17 p.m. EDT (2217 GMT).

The Falcon 9's first stage came back to Earth for a vertical landing about 8.5 minutes after launch, touching down on the SpaceX droneship Just Read the Instructions, which was stationed in the Atlantic Ocean.

It was the ninth launch and landing for this particular booster, according to a SpaceX mission description. And, more excitingly, it was the 300th touchdown overall for a Falcon 9 or Falcon Heavy first stage, the company said via X shortly after touchdown.

Related: Starlink satellite train: How to see and track it in the night sky

A SpaceX Falcon 9 rocket sits on the deck of a droneship at sea shortly after launching 23 Starlink satellites from Florida on April 23, 2024. The booster's touchdown was the 300th landing overall for a Falcon 9 or Falcon Heavy first stage,  (Image credit: SpaceX)

SpaceX first landed an orbital rocket in December 2015, when a Falcon 9 first stage aced its touchdown at Cape Canaveral. Reuse is now routine for the company; one of its Falcon 9 boosters has 20 launches under its belt, for example.

Getting back to today's flight: The Falcon 9's upper stage continued carrying the 23 Starlink satellites to low Earth orbit (LEO), deploying them about 65 minutes after liftoff as planned.

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This evening's launch was the 41st of the year for SpaceX, and the 28th of 2024 dedicated to building out the huge and ever-growing Starlink megaconstellation. There are nearly 5,800 operational Starlink satellites in LEO at the moment, according to astrophysicist and satellite tracker Jonathan McDowell.

The Starlink launch ended up being the first half of a spaceflight doubleheader: A Rocket Lab Electron vehicle launched two satellites, including a NASA solar-sailing technology demonstrator, from New Zealand today at 6:33 p.m. EDT (2233 GMT).

Editor's note: This story was updated at 6:30 p.m. ET on April 23 with news of successful launch and first-stage landing.

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2024-04-24 05:37:42Z
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