Kamis, 13 Oktober 2022
RIT professor reacts to NASA's success against future killer rocks - News 8 WROC
https://news.google.com/__i/rss/rd/articles/CBMiK2h0dHBzOi8vd3d3LnlvdXR1YmUuY29tL3dhdGNoP3Y9a1FLMmJKUUo1c0HSAQA?oc=5
2022-10-13 17:33:06Z
1603502014
NASA’s asteroid deflection mission was more successful than expected. An expert explains how - EastMojo
On September 26, after a nine-month journey through the Solar System, NASA’s Double Asteroid Redirection Test (DART) mission impacted an asteroid called Dimorphos.
NASA scored a bullseye, with DART – roughly the size of a vending machine – hitting Dimorphos within 10% of the 160-metre asteroid’s centre. The hit changed the orbit of Dimorphos around its bigger companion asteroid Didymos by more than 30 minutes, far exceeding the original goal.
This is the first time humans have deliberately changed the motion of a significant Solar System object. The test shows it’s plausible to protect Earth from asteroid impacts using similar future missions, if needed.
An astonishing feat
The successful mission is an astonishing feat of science and engineering. In the final phases of approach before impact, DART autonomously steered itself to the impact site, processing images onboard the spacecraft and adjusting its trajectory without the intervention of humans.
Many telescopes on Earth, and an Italian spacecraft that tagged along with DART, were able to obtain amazing images of the impact. Even small telescopes captured spectacular views, showing an enormous plume of debris from the impact that developed into a trail now following the asteroid through space.
The DART mission was the first test of planetary defence – the use of a spacecraft to change the trajectory of an asteroid.
In the future, such a technique could protect Earth from asteroid impact, if we detect an asteroid on a collision course with us. By changing the direction of an asteroid when it is far from Earth, a collision could be avoided.
How was DART so successful?
Dimorphos was chosen as the target for DART because it is part of a double asteroid system – it orbits a larger, 780-metre asteroid called Didymos. Before the impact, this orbit was very regular and could be measured by large telescopes from Earth. Measurements showed the period of the orbit was about 11 hours and 55 minutes.
The DART mission goal was to show the orbit of Dimorphos would be changed by the impact, which took place 11 million kilometres from Earth, with the spacecraft travelling at 25,000 kilometres per hour.
Telescopes on Earth measured the orbit before and after the impact. The minimum change to the orbit to declare mission success was 73 seconds.
The data are in and DART changed the orbit of Dimorphos by a whopping 32 minutes (plus or minus 2 minutes).
The change is large, partly because of the resulting debris plume. The act of throwing all that debris off the asteroid generated a recoil, like the recoil of a gun; the bullet is fired in one direction and the gun recoils in the opposite direction. It’s the same with the debris plume and the asteroid.
Good news for planetary defence
By any measure, DART has therefore been a huge success. DART made a bullseye and showed that missions like this can alter the trajectories of asteroids. The idea has been around for a long time, and has inspired many asteroid movies. Now, engineering and science have caught up.
If, in the future, an asteroid is found to be on a collision path with Earth, and we have enough warning, a next-generation mission based on the DART experience could well save Earth and humanity from significant losses.
DART cost approximately US$324 million, and at this point it looks like money well spent.
As more data on the impact are analysed, planetary defence techniques can be refined. We will also learn a lot about asteroids from the data collected. A European mission is planned to go to the Didymos/Dimorphos system and take a close look at the impact crater, which will provide even more detailed information.
Steven Tingay, John Curtin Distinguished Professor (Radio Astronomy), Curtin University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
Also Read | DART: NASA’s crash was successful in shifting an asteroid’s orbit
https://news.google.com/__i/rss/rd/articles/CBMiiAFodHRwczovL3d3dy5lYXN0bW9qby5jb20vZmVhdHVyZXMvMjAyMi8xMC8xMy9uYXNhcy1hc3Rlcm9pZC1kZWZsZWN0aW9uLW1pc3Npb24td2FzLW1vcmUtc3VjY2Vzc2Z1bC10aGFuLWV4cGVjdGVkLWFuLWV4cGVydC1leHBsYWlucy1ob3cv0gEA?oc=5
2022-10-13 16:30:00Z
1603502014
Rabu, 12 Oktober 2022
rize kamishiro - OECTA
Since she is sequestered, I assume that Halanna has not seen fit to apologize. Let me do so in her stead, he said, allowing everyone to heave sighs of relief.
Avicus shook his head.Far longer than that, old friend, he said,I can't tell you how many times we've tried to wake you. Marius, the Western Empire is truly no more.
Received. Your purpose in landing?
Mayo let the story dangle on a thread of suspicion. The engineer in the booth switched back to the studio camera, and Mayo went into the next story.
Outside the tent, thousands of stars flickered against the black sea of deep space. A cold wind blew down from the mountain. Gampo pulled the fur closer around his neck until the tent warmed. Then he patiently waited for the hours to pass.
maze of blurred faces came down from the monstrous black fish, gently lifting his nude and badly injured body and wrapping him in a blanket. One of the faces detached itself from the rest and leaned closely over Pitt
Senator Pitt entered followed by Hala, Colonel Hollis and Captain Collins. The men shook hands, but Hala leaned down and lightly kissed Pitt.
But I don't even know the way back to my own country, pleaded Edmund.That's easy, answered the Queen.Do you see that lamp? She pointed with her wand and Edmund turned and saw the same lamp-post under which Lucy had met the Faun.Straight on, beyond that, is the way to the World of Men. And now look the other way'-here she pointed in the opposite direction-and tell me if you can see two little hills rising above the trees.
'Not many rabbits?'
(Estblshd AM 1789)
I cannot tell you what is the right thing to do, Prince Josua. The old knight spoke, as he had since regaining his wits, with a sort of effortless dignity. His old-fashioned, courtly speech was so careful as to seem almost a parody; he might have been the Good Peasant from the proverbs of the Book of the Aedon, That is beyond me, nor would I presume to interpose myself between you and God, who is the final answerer of all questions. I can only tell you what I think. He leaned forward, staring down at his long-fingered hands, which were twined on the table before him as if he prayed. Much of what has been said is still incomprehensible to me-your brothers bargain with this Storm King, who was only a dim legend in my day; the part you say the swords are to play, my black blade Thorn among them-it is all most strange, most strange.
He twitched his head. No, not entirely, he said. But there will be no finishing. Electronics Specialist Shawn is ill.
Audrey turned to him, hands on her hips.Well, what do you intend to do? Stay here and amuse yourselves by making shadow-animals on the goddam movie screen?
It wasn't until the sound of the big boys' buffalolike progress through the Barrens had died away completely, and Eddie's nose-bleed had actually stopped, that his asthma got bad. He started heaving for air, his hands opening and then snapping shut like weak traps, his respiration a fluting whistle in his throat.
Bill's face was bewildered. The light lay on his skin like silver gilt. 'Rosie,' he said in a weak and worried voice. His lips continued to move, but he said no more.
"Knife," he said, and held out his hand like a surgeon in an operating room. Roland slapped it into his palm without a word.
"Where you find Weber?" the sheriff asked. "Did he have any enemies?"
"Riddles, dear Fitzy-fitz, are supposed to make folk think. To find new truth in old saws. But, be that as it may .... Your brain eludes me. How shall I reach it? Perhaps if I came to you, by dark of night, and sang under your window:
No! She could not let herself accept any part of his dream!
The name depressed him. 'You represent his father?'
The boat drew nearer. It was the pirate dinghy, with three figures in her, Smee and Starkey, and the third a captive, no other than Tiger Lily. Her hands and ankles were tied, and she knew what was to be her fate. She was to be left on the rock to perish, an end to one of her race more terrible than death by fire or torture, for is it not written in the book of the tribe that there is no path through water to the happy hunting-ground? Yet her face was impassive; she was the daughter of a chief, she must die as a chief's daughter, it is enough.
Danan said gently, "There's a quiet room in the east tower where you can wash and rest; come down later when it's not so crowded. Most of these men will return to Kyrth after supper; they only work here." He led through a side door out of the hall, up a stairway winding through the core of a wide tower. He added, "This is the tower Yrth stayed in. Talies used to visit him here, and Suth, a couple of times. Suth was a wild one, hair white as snow even when he was young. He frightened the miners, but I saw him once changing into shape after shape to amuse my children." He stopped on a landing, drew back heavy hangings of white fur hi a doorway. "I'll send someone to make up your fire." He paused, said a little hesitantly, "If it isn't asking too much of you, I would love to hear that harp again."
So why's he letting them hold him in jail?
I would give Captain Hayward's plan a very low probability of success. Captain Hayward is not a psychologist, and her prognostications of human behavior are simply lay opinion, not based on scientific study of human psychology.
Best night's rest in eighteen months, Carson grinned.
Now the Master's got a hundred things to look after. His first concern is his College and the scholarship there. So if he sees a threat to that, he has to move agin it. And the Church in recent times, Lyra, it's been a getting more commanding. There's councils for this and councils for that; there's talk of reviving the Office of Inquisition, God forbid. And the Master has to tread warily between all these powers. He has to keep Jordan College on the right side of the Church, or it won't survive."
Crosse nodded. Then shall we go? No point in waiting. Shall we fish and chip?
Yes. Very good.
"Don't say it," Inigo said, entering.
https://news.google.com/__i/rss/rd/articles/CBMiNmh0dHBzOi8vd3d3LmNhdGhvbGljdGVhY2hlcnMuY2EvYXBwLmFzcHg_aUIyUFQ4YWYuaHRtbNIBAA?oc=5
2022-10-12 14:05:08Z
CBMiNmh0dHBzOi8vd3d3LmNhdGhvbGljdGVhY2hlcnMuY2EvYXBwLmFzcHg_aUIyUFQ4YWYuaHRtbNIBAA
Selasa, 11 Oktober 2022
Photographer Captures SpaceX Rocket Firing in Front of Full Moon - PetaPixel
Nicholas D’Alessandro captured this incredible photo of a SpaceX Falcon 9 rocket launching in front of the full moon.
The amazing picture was captured last Saturday (October 8) at Cape Canaveral Space Force Station in Florida and is just one photo converted from RAW.
D’Alessandro tells PetaPixel that the photo was three days in the making after launches were scrubbed on the previous two days due to a helium leak. But, fortuitously this led to the best conditions for the photo.
“It happened to be the best day out of the three for the moon’s position, as it was increasingly full and lower on the horizon which each successive attempt,” explains, D’Alessandro.
“A fourth attempt would have been off the table as the moon rose after the launch at that point.”
The sounds of happy rocket photographers having days of hard work and planning finally pay off 🚀🌔 pic.twitter.com/HiJfgKAeP0
— Nicky D’Alessandro (@NickyXPhoto) October 10, 2022
Planning the Shot
D’Alessandro used a Canon R5 with a Sigma 150-600 lens and a 2x teleconverter to achieve a 1200mm optical zoom.
The photo captured the launch of SpaceX Intelsat’s Galaxy 33 (G-33) and Galaxy 34 (G-34) satellites and D’Alessandro used a specialist app to help him capture the epic shot.
“A rocket enthusiast and programmer named Declan Murphy made a breakthrough for rocket photographers in recent years by developing an app called Flight Club (a reference to the movie Fight Club) that overlays any upcoming launch trajectory with the features of the sky in predictive real time and even what your frame will look like based on the camera equipment info you enter,” he says.
“It isn’t laser perfect yet, but it’s accurate enough to make planning long exposure rocket path streak shots and celestial body shots suddenly far more accessible.”
With the help of the app, D’Alessandro noticed before the launch that all the “ingredients were coming together.”
“The Moon would be increasingly full and rising lower on the horizon as the days got closer to launch. The weather was also beautifully clear for the next several days,” he explains.
“I checked the Flight Club software and sure enough there was a point in north Titusville where the shot could be achieved.”
His desired location was on a private condominiums pool desk so he had to secure permission before shooting from there.
“The condo allowed us to shoot from their property, The Moon was huge and low, the weather was clear, the rocket launched, and the Flight Club software was accurate. The rocket crossed the moon and the rest is history.”
More of D’Alessandro’s work can be found on his Twitter, Instagram, and Facebook.
https://news.google.com/__i/rss/rd/articles/CBMiYmh0dHBzOi8vcGV0YXBpeGVsLmNvbS8yMDIyLzEwLzExL3Bob3RvZ3JhcGhlci1jYXB0dXJlcy1zcGFjZXgtcm9ja2V0LWZpcmluZy1pbi1mcm9udC1vZi1mdWxsLW1vb24v0gEA?oc=5
2022-10-11 15:41:58Z
1603216785
SpaceX launches cargo mission to ISS - AP Archive
https://news.google.com/__i/rss/rd/articles/CBMiK2h0dHBzOi8vd3d3LnlvdXR1YmUuY29tL3dhdGNoP3Y9N2Y0d2c1MXgxU2vSAQA?oc=5
2022-10-11 15:09:24Z
1586516912
Senin, 10 Oktober 2022
Thanks to Hayabusa 2's Samples, Scientists can Track the History of Ryugu Earlier in the History of the Solar System - Universe Today
When Huyabusa2 returned a sample of Ryugu, a Near Earth Asteroid, to Earth in December 2020, it was sure to light a bonfire of material science research. We’re starting to see the beginning of that, and a new study led by a scientist at Lawrence Livermore National Laboratory has found a particular grain in the sample Huyabusa2 collected that shows how the asteroid formed.
The entire Huyabusa2 mission was predicated on the idea that if humanity truly wants to understand what an asteroid is made up of, it needs to bring a sample of that asteroid back to where it can be poked and prodded by the advanced scientific instruments we have at our disposal back on Earth. Hence, the reason for the world’s first asteroid sample return mission.
One of those advanced scientific instruments is an ion mass spectrometer, which partially vaporizes a sample and then analyzes the different ion types released from those vapors. An international team got a chance to use one of the world’s most advanced ones on a sample from Ryugu.
Credit – Anton Petrov YouTube Channel
Ryugu itself is derived from an earlier, larger asteroid that was formed around the same time as the solar system. Some cataclysmic event eons ago broke off the piece that is today thought of as an asteroid, but some of its constituent parts are still from that primordial soup of the early solar system.
Samples from Huyabusa2 offer a unique look into that world – the closest we’ve come to directly sampling it before was through meteorites, which have obviously been through some dramatic events that could have changed their chemistries. Ryugu’s material is much more indicative of the early material scientists would expect to see during the solar system’s formation.
What they found in that sample surprised them – there were anhydrous silicates, a type of rock that contains no water. This contrasts with other types of silicates that were subjected to a prolonged period of exposure to water. The particular grain this was found in, known as C0009, only contained about .5% of its volume as the anhydrous silicates, but that was enough to pique that investigator’s interest.
Credit – JAXA
That interest was directed at similarities between the grain C0009 and other “high-temperature components” of a rare type of asteroid called non-CI chondrite carbonaceous chondrites. Ryugu itself is a B-type, a specific type of the more common C-type asteroids, which has a slightly blue hue when viewed from far away.
This discovery helps place Ryugu more solidly among the different classifications of asteroids and points to a better understanding of the early solar system awaiting more regular visits to other asteroids. As space exploration enters a new commercial phase, and one of the primary commercial ends is utilizing asteroid resources to build the space infrastructure necessary to expand, there are sure to be more missions to asteroids that will collect more samples. It remains to be seen how many will be subjected to a fully mass spectrometer, though.
Learn More:
LLNL – Team identifies parent body materials in Ryugu asteroid
UT – Samples From Asteroid Ryugu Contain Bits That Came From Outside the Solar System
UT – Asteroid Ryugu Might Actually Be a Dead Comet
UT – Samples of Asteroid Ryugu Contain More Than 20 Amino Acids
Lead Image:
Part of the asteroid Ryugu that was returned to Earth as part of the Hyabusa2 missions.
Credit – A. Yamaguchi / NPIR
https://news.google.com/__i/rss/rd/articles/CBMimAFodHRwczovL3d3dy51bml2ZXJzZXRvZGF5LmNvbS8xNTc5NDUvdGhhbmtzLXRvLWhheWFidXNhLTJzLXNhbXBsZXMtc2NpZW50aXN0cy1jYW4tdHJhY2stdGhlLWhpc3Rvcnktb2Ytcnl1Z3UtZWFybGllci1pbi10aGUtaGlzdG9yeS1vZi10aGUtc29sYXItc3lzdGVtL9IBAA?oc=5
2022-10-10 14:13:51Z
CBMimAFodHRwczovL3d3dy51bml2ZXJzZXRvZGF5LmNvbS8xNTc5NDUvdGhhbmtzLXRvLWhheWFidXNhLTJzLXNhbXBsZXMtc2NpZW50aXN0cy1jYW4tdHJhY2stdGhlLWhpc3Rvcnktb2Ytcnl1Z3UtZWFybGllci1pbi10aGUtaGlzdG9yeS1vZi10aGUtc29sYXItc3lzdGVtL9IBAA
Minggu, 09 Oktober 2022
These New Pictures Of The Trail Of Devastation Left Behind From NASA’s Asteroid Collisions Look Absolutely Amazing - Wonderful Engineering
NASA has recently made some tweaks to the recipe and smashed its Double Asteroid Redirection Test (DART) spacecraft with a tiny asteroid moonlet known as “Dimorphos”. The practice has been done in order to anticipate the nature of destruction caused by the collision between the two and if DART would be able to change the flight path of the asteroid or not. Consequently, this enormous collision surpassed all projections and created a gigantic landscape of space debris. It should be noted that the images of the collision were captured by both the observatories on the ground and in space, and it is just an uncanny sight to behold.
Coupled with this, in order to get a clearer insight, a team of researchers in Chile have used a Southern Astrophysical Research (SOAR) Telescope, and the images captured from this telescope reveal that a series of gigantic clouds made of space debris have been liberated from this tiny asteroid moonlet. Hence, this test conducted by NASA left marks of destruction that were 6,000 miles long. Teddy Kareta, who is an astronomer at the Lowell Observatory in Arizona, who produced the new image, said, “It is amazing how clearly we were able to capture the structure and extent of the aftermath in the days following the impact.”
Not to mention, along with the 1,345 pounds spacecraft of NASA, another state-of-the-art technology known as the Light Italian CubeSat for Imaging of Asteroids (LICIACube), captured the images of the devastating collision as well and hence, made great strides. On the other hand, NASA Administrator Bill Nelson expressed his views in a statement issued recently and said, “For the first time, Webb and Hubble have simultaneously captured imagery from the same target in the cosmos: an asteroid that was impacted by a spacecraft after a seven-million-mile journey.”
To that end, this recent test has opened a door to new opportunities for scientists to further study the impacts of this collision and gather any important insights relating to this matter. Similarly, Katarina Miljkovic, who is a planetary scientist, quoted, “From this one impact event, we can learn more about the mechanics of impacts into small bodies, momentum transfer, and the ability to use artificial impactors to nudge asteroids out of their orbits. Now the science can start.”
https://news.google.com/__i/rss/rd/articles/CBMikwFodHRwczovL3dvbmRlcmZ1bGVuZ2luZWVyaW5nLmNvbS90aGVzZS1uZXctcGljdHVyZXMtb2YtdGhlLXRyYWlsLW9mLWRldmFzdGF0aW9uLWxlZnQtYmVoaW5kLWZyb20tbmFzYXMtYXN0ZXJvaWQtY29sbGlzaW9ucy1sb29rLWFic29sdXRlbHktYW1hemluZy_SAZcBaHR0cHM6Ly93b25kZXJmdWxlbmdpbmVlcmluZy5jb20vdGhlc2UtbmV3LXBpY3R1cmVzLW9mLXRoZS10cmFpbC1vZi1kZXZhc3RhdGlvbi1sZWZ0LWJlaGluZC1mcm9tLW5hc2FzLWFzdGVyb2lkLWNvbGxpc2lvbnMtbG9vay1hYnNvbHV0ZWx5LWFtYXppbmcvYW1wLw?oc=5
2022-10-09 13:26:15Z
1591965161
Langganan:
Postingan (Atom)