The United Launch Alliance Atlas 5 rocket carrying the Mars rover lifts off from Florida's Cape Canaveral Air Force Station.
Joe Burbank/Orlando Sentinel/Tribune News Service via Getty ImagesJuly has been an exceptionally busy month for Martian robotic explorers. The UAE's Hope Probe departed the Earth for the red planet on July 19 and China's Tianwen-1, containing a trio of robots, followed shortly after. Now, it's NASA's turn. On Thursday, it flawlessly launched two robotic explorers to the red planet: a next-gen rover, known as Perseverance, and a helicopter, known as Ingenuity.
Ingenuity is a tech demonstration, aiming to be the first vehicle to achieve powered-flight on another planet. Perseverance has a bigger, bolder mission -- on that could forever change our understanding of the cosmos. It will hunt for signs of past life on the red planet.
The dry, dusty Mars we know today was very different in the deep past. Humanity's latest rover is making a beeline for an area of Mars that was once home to a lake, a perfect place to look for signs of ancient microbes.
Since Sojourner in 1997, NASA has sent a succession of increasingly sophisticated wheeled explorers to Mars. Perseverance is the latest and greatest and in July 2020, it launched on an epic journey across space.
On a mission
Perseverance will do much more than snap amazing images of Mars. These are some of the key mission objectives:
- Look for signs of ancient microbial life.
- Collect Martian rock and dust samples for later return to Earth.
- Deliver an experimental helicopter.
- Study the climate and geology of Mars.
- Demonstrate technology for future Mars missions.
The mission is planned to last for at least one Mars year, which works out to about 687 days on Earth (it takes longer for Mars to go around the sun). However, NASA has a good track record with extending its robotic Mars missions. We can look to the long-lived Opportunity and Curiosity rovers as role models for this.
Hello, Mars
NASA performed extensive tests of the parachute system that will lower Perseverance to Mars.
NASA/JPL-CaltechThe rover's Mars arrival is set for Feb. 18, 2021. The landing process will include some of the most harrowing minutes of the entire mission.
Perseverance will get to try out a new method that NASA hopes will deliver it as close to its targeted landing site as possible. NASA calls this the "Range Trigger" technique and it's all about deploying the parachutes at exactly the right time.
"If the spacecraft were going to overshoot the landing target, the parachute would be deployed earlier," said NASA. "If it were going to fall short of the target, the parachute would be deployed later, after the spacecraft flew a little closer to its target."
Earth observers can look forward to an unprecedented view of the entry, descent and landing process. The mission is equipped with cameras and a microphone to capture all of the excitement and stress as NASA attempts to land Perseverance gently onto the surface of Mars.
Jezero Crater
This Mars Reconnaissance Orbiter image shows the Jezero Crater delta region.
NASA/JPL-Caltech/MSSS/JHU-APLJezero Crater is located just north of Mars' equator and was once home to a river delta. That history of water makes it a prime spot to look for signs of past microbial life. Sounds like the perfect landing site for a science laboratory on wheels.
"The landing site in Jezero Crater offers geologically rich terrain, with landforms reaching as far back as 3.6 billion-years-old, that could potentially answer important questions in planetary evolution and astrobiology," said NASA's Thomas Zurbuchen when the site was announced in 2018.
Vital statistics
The car-sized Perseverance rover looks fairly similar to its predecessor, Curiosity, but also represents quite a few technology advances since Curiosity was designed. Here are the numbers:
Length: 10 feet (3 meters)
Weight: 2,260 pounds (1,025 kilograms)
Wheels: Six aluminum wheels with titanium spokes
Top speed: Just under 0.1-miles per hour (152 meters per hour)
Science instruments
The Perseverance rover is stocked with instruments that it will use to investigate the Jezero Crater on Mars.
NASAPerseverance is loaded with seven instruments chosen to help it achieve its mission objectives. You can get the full rundown from NASA, but here are some highlights:
Mastcam-Z: The camera system mounted on the rover's mast is equivalent to eyes on a head. According to NASA, its main job is "to take high-definition video, panoramic color and 3D images of the Martian surface and features in the atmosphere with a zoom lens to magnify distant targets." The mastcam will be our main viewing window onto the Jezero Crater.
Moxie: The Mars Oxygen In-Situ Resource Utilization Experiment is one of the ways Perseverance is helping to prepare humans to go to Mars. This instrument is designed to make oxygen from the carbon-dioxide atmosphere. This capability will be necessary to help future human explorers breathe, but it would also help us make propellant for rockets right on site. That's a necessary step for bringing our Mars astronauts back to Earth after their missions.
SuperCam: When you put a camera, laser and spectrometers together, you get SuperCam, an instrument that will help look for organic compounds, a key part of the quest for signs of past microbial life. "It can identify the chemical and mineral makeup of targets as small as a pencil point from a distance of more than 20 feet (7 meters)," said NASA.
Sherloc: The "Scanning Habitable Environments with Raman & Luminescence for Organics & Chemicals" or Sherloc, as the instrument is affectionately known, will search for signs of life on the red planet. The instrument and its companion camera (nicknamed Watson) are capable of taking microscopic images of Mars and analyzing them. Equipped with a laser it can fire at the surface, Sherloc is able to measure chemicals present in the soil and rock using a technique known as spectroscopy.
Helicopter on board
The NASA Mars helicopter team attaches a piece to the flight model in early 2019.
NASA/JPL-Caltech"Let's send a helicopter to Mars" might sound a little far-fetched, but NASA is doing it anyway. Ingenuity, a small helicopter designed to work in the challenging conditions on the red planet, is all tucked into the rover's belly where it will ride out the journey.
Ingenuity is a high-risk, high-reward technology demonstration. It will hang out under the rover for a few months until NASA finds a suitable spot to deploy it. Perseverance will drop it onto the Martian surface and then move away.
The helicopter will make the first attempt at powered flight on another planet. NASA hopes Ingenuity soars and becomes a model for a new way to investigate other worlds.
Check out this video for more on how this little chopper could change the way we approach space exploration.
Watch this: How NASA's Mars helicopter could change the future of...
5:20
Joining its siblings
NASA currently has two machines operating on the surface of Mars, the stationary InSight lander and the Mars rover Curiosity. InSight is located in a region called Elysium Planitia, a large plains area. Curiosity is cruising around Gale Crater, a giant ditch with a massive mountain inside it. Perseverance will be scoping out a very different part of the planet as it continues NASA's legacy of Mars exploration.
The last time we had two functioning rovers on Mars was in 2018 when the Opportunity rover lost contact with home due to the impact of a global dust storm. Perseverance won't have the same issues as Opportunity. Like Curiosity, it uses a nuclear power source that doesn't require sunlight to keep it going.
Watch this: How NASA's new Perseverance Mars rover compares with...
5:49
'Explore as one'
This plate holds the names of nearly 11 million people and carries a coded message.
NASA/JPL-CaltechPerseverance will be a long way from Earth, but it will carry poignant remembrances of its home planet. Over 10.9 million people signed up to have their names travel with the rover through NASA's Send Your Name to Mars public outreach program. The names are etched on small silicon chips that NASA installed on the rover on an aluminum plate underneath a protective shield.
The plate also bears an illustration of the Earth, our sun and Mars. Hidden in the sun's rays is the message "explore as one," written in Morse code.
A separate aluminum plate pays tribute to health care workers and their efforts to aid humanity during the coronavirus pandemic. This plate carries an illustration of a serpent wrapped around a rod with the Earth at the top.
These names and messages are a reminder that NASA's robotic explorers never truly travel alone. Perseverance is the culmination of years of effort from NASA, but it's also an emissary for humanity, an extension of our curiosity and sense of wonder and a little bit of Earth on Mars.
https://news.google.com/__i/rss/rd/articles/CBMiaWh0dHBzOi8vd3d3LmNuZXQuY29tL2hvdy10by9uYXNhLWxhdW5jaGVkLW5leHQtbWFycy1yb3Zlci1ldmVyeXRoaW5nLXlvdS1uZWVkLXRvLWtub3ctYWJvdXQtcGVyc2V2ZXJhbmNlL9IBcmh0dHBzOi8vd3d3LmNuZXQuY29tL2dvb2dsZS1hbXAvbmV3cy9uYXNhLWxhdW5jaGVkLW5leHQtbWFycy1yb3Zlci1ldmVyeXRoaW5nLXlvdS1uZWVkLXRvLWtub3ctYWJvdXQtcGVyc2V2ZXJhbmNlLw?oc=5
2020-07-30 17:02:00Z
52780957088651
Tidak ada komentar:
Posting Komentar