Perseverance landing must-see TV Feb. 18
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newb3e
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Pks have many interest but your kind needs to think beyond hate and biases and stop being such annoying sore losers all the time! these missions are not just for china or usa or uae even indians orbiter is a huge achievement we just have to hope that both rovers land and start sending data from mars so we can learn more about universe!
ohh yes that would be awesome!
imagine astronaut standing on red planet watching stars no light polution no obstructions!
jamahir
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Indeed. But I am surprised that prior lander / rover missions never thought of including microphones. Or maybe I am wrong.
I am currently reading the fictional 'Mars' by Ben Bova and the hero in it, James Waterman, encounters the sounds of Mars outside the habitation dome, as he prepares to sleep on the first night there.
This vid of time lapse recording of sunsets on Mars and Earth.
newb3e
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russian probe recorded sounds from Venus or saturn its on youtube it isnt much just wind blowing at crazy speed but gives you goosebumps listening to how other planets sound. here i found something amazing check it out <video>
jamahir
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The auroras are beautiful, delicate.
newb3e
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auroras man!! its a dream to see them! one day hopefully!
Watch the series, the expanse , on prime videos. Excellent sci fi. Very good visuals.
jamahir
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Thank you for the recommendation. I have read the plot yesterday and it seems nice.
Also, I am waiting for the release of the film Dune which supposedly will release sometime this year.
TruthSeeker
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Mars 2020: Perseverance Rover - NASA Science
NASA’s Mars Perseverance rover seeks signs of ancient life and collects samples of rock and regolith for possible Earth return.
mars.nasa.gov
Watch the Feb. 18 Landing Broadcast
Show starts at 11:15 a.m. PST / 2:15 p.m. EST / 19:15 UTC
Landing is just around the corner and there’s lots of programming you can tune in for. Use the table below to see all of the upcoming shows. On landing day, the broadcast will be available here and on multiple platforms. Scroll down to find your favorite platform and enjoy the show.
- Spanish Language: we have a one-hour program all in Spanish
- 360-degree Stream: for an immersive look at our control room try the 360-degree view
- Clean Feed: if you are doing your own programming or if you want to see uninterrupted video of the landing, try the clean feed
Upcoming Events
| Date | Title | Channel | Can I ask questions? |
| Feb. 16, 2021 9:15 a.m. PST / 12:15 p.m. EST | High School Students – Countdown to Landing | Watch on YouTube NASAJPL Edu | Register to ask questions |
| Feb. 16, 2021 10 a.m. PST / 1 p.m. EST | News Briefing: Mission Engineering and Technology Overview | Watch on YouTube NASA JPL | via @nasa using #CountdownToMars |
| Feb. 16, 2021 11:30 a.m. PST / 2:30 p.m. EST | Middle School Students – Countdown to Landing | Watch on YouTube NASAJPL Edu | Register to ask questions |
| Feb. 16, 2021 12:30 p.m. PST / 3:30 p.m. EST | News Briefing: Mission Science Overview | Watch on YouTube NASA JPL | via @nasa using #CountdownToMars |
| Feb. 17, 2021 9:30 a.m. PST / 12:30 p.m. EST | Elementary School Students – Countdown to Landing | Watch on YouTube NASAJPL Edu | Register to ask questions |
| Feb. 17, 2021 10 a.m. PST / 1 p.m. EST | News Briefing: Mission Landing Update | Watch on YouTube NASA JPL | via @nasa using #CountdownToMars |
| Feb. 17, 2021 12 p.m. PST / 3 p.m. EST | News Briefing: Searching for Ancient Life at Mars and in Samples Returned to Earth | Watch on YouTube NASA JPL | via @nasa using #CountdownToMars |
| Feb. 18, 2021 9:30 a.m. PST / 12:30 p.m. EST | Landing Day Live Stream for Students | Watch on YouTube NASAJPL Edu | Register to ask questions |
| Feb. 18, 2021 11:15 a.m. PST / 2:15 p.m. EST | LIVE Landing Broadcast: Perseverance Rover Lands on Mars Channels that will carry the live broadcast include: YouTube, Twitter, Facebook, LinkedIn, Twitch, Daily Motion, Theta.TV, and NASA App Spanish-language show NASA Clean feed of mission control on YouTube NASA JPL Raw 360-degree stream on YouTube NASA JPL | via @nasa using #CountdownToMars | |
| Feb. 18, 2021 No earlier than 2:30 p.m. PST / 5:30 p.m. EST | Post-Landing News Briefing | Watch on YouTube NASA JPL | via @nasa using #CountdownToMars |
| Feb. 19, 2021 10 a.m. PST / 1 p.m. EST | News Briefing: Mars 2020 Perseverance Rover Update | Watch on YouTube NASA JPL | via @nasa using #CountdownToMars |
| Feb. 22, 2021 11 a.m. PST / 2 p.m. EST | News Briefing: Mars 2020 Perseverance Rover Update | Watch on YouTube NASA JPL | via @nasa using #CountdownToMar |
TruthSeeker
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NASA Is Dropping a New Rover on Mars. Here’s What Could Go Wrong
George Dvorsky
Saturday 9:00AM
Depiction of the Perseverance landing, with the rover still attached to backshell and retro-rockets engaged for powered descent.Illustration: NASA/JPL-Caltech
Failure could take on many forms next week when NASA’s next-gen rover, Perseverance, reaches the surface of the Red Planet. Here’s what needs to go right—and how things could quickly go sideways—when Perseverance tries to make its much-anticipated landing.
For NASA, the entry, descent, and landing (EDL) of Perseverance on Thursday, February 18 presents numerous potential points of failure. NASA has said that “hundreds of things have to go just right” for the rover to survive the seven minutes of terror. We can’t take a safe landing for granted: As NASA points out, only “about 40 percent of the missions ever sent to Mars—by any space agency—have been successful.” Which, yikes.
In a nutshell, Perseverance will have to transition from speeds reaching 12,500 miles per hour (20,000 km/hr) to a walking pace over the course of several minutes. What’s more, it’ll have to perform this autonomously, as it takes nearly 11 minutes for radio signals to reach Earth. To complicate matters, NASA is debuting two new technologies for the mission, both relating to the EDL phase and both unproven.
All three phases—entry, descent, and landing—present their own unique challenges.
Graphic showing the various stages of the upcoming landing.Graphic: NASA/JPL-Caltech
The rover, nestled inside the descent stage, will separate from the cruise stage, which, with its solar panels, radios, and fuel tanks, will no longer be required. Next, the spacecraft will have to orient itself such that its heat shield is facing forward, a task made possible by small thrusters located on the backshell. During atmospheric entry, the spacecraft’s heat shield will need to endure temperatures reaching 2,370 degrees Fahrenheit (1,300 degrees Celsius). A structural failure at this stage would be catastrophic, ending the mission before it has a chance to get started.
Indeed, previous missions to the Red Planet have failed right at the Martian doorstep. In 1999, NASA’s Mars Climate Orbiter entered into an orbit that was way too low, causing the spacecraft to burn up in the atmosphere. The failure was eventually traced to a conversion error, in which imperial units of pound-seconds were not converted to the standard metric Newton-seconds. Hate it when that happens.
Should the descent stage survive atmospheric entry, it will still have to contend with variably dense air pockets that could steer it off course. A guided entry will be performed to avoid this problem, in which the descent stage will fire small thrusters to compensate.
Graphic comparing the size of the Curiosity rover’s landing ellipse (blue) with Perseverance’s landing ellipse (red).Graphic: NASA/JPL-Caltech
The unfurling of the 70-foot-wide (21.5-meter) parachute is next. Should the parachute unfurl properly and not get tangled, the descent stage will abruptly decelerate to 1,000 miles per hour (1,600 km/h), which is still blazingly fast (remember, Mars has a super thin atmosphere). The deployment of this supersonic parachute will depend on an unproven new technology called Range Trigger, which will calculate the distance to the landing spot and trigger the parachute to deploy at just the right moment. This is expected to happen approximately 240 seconds after atmospheric entry, when the descent stage is about 7 miles (11 km) above the surface. Perseverance will bid farewell to its heat shield around 20 seconds after the parachute has unfurled, introducing another potential point of failure.
This is a critical stage—one with regrettable historical precedents. During the failed landing of ESA’s Schiaparelli mission in 2016, the descent stage prematurely ejected the parachute and heat shield, the result of a software glitch. An onboard computer thought it was just a few feet off the ground, but in reality the descent stage was somewhere between 1.25 and 2.5 miles (2-4 km) above the surface. You can imagine what happened next. The doomed Schiaparelli lander was traveling at around 185 miles per hour (300 km/h) when it smashed into the Martian regolith.
Graphic showing how the terrain-relative navigation system will work.Graphic: NASA/JPL-Caltech
With the heat shield gone, and with the rover now finally exposed to the Martian atmosphere, another new technology will kick in, called Terrain-Relative Navigation. The proper execution of this tool will be critical, as the chosen landing spot, a crater, is quite dangerous.
“Jezero is 28 miles wide, but within that expanse there are a lot of potential hazards the rover could encounter: hills, rock fields, dunes, the walls of the crater itself, to name just a few,” Andrew Johnson, principal robotics systems engineer at NASA’s Jet Propulsion Laboratory, said in a press release. “So, if you land on one of those hazards, it could be catastrophic to the whole mission.”
Here’s how NASA describes the new tool, which should allow the landing craft to determine its position relative to the surface with a degree of accuracy close to around 130 feet (40 meters) or less.
Depiction of the skycrane maneuver.Illustration: NASA/JPL-Caltech
Some 12 seconds prior to touchdown, and at the very reasonable speed of 1.7 miles per hour (2.7 km/hr), it’ll be time for the skycrane maneuver. The backshell will lower the rover using three 66-foot-long (20-meter) cables, during which time the rover’s legs and wheels will move into their landing position. Perseverance, sensing an imminent landing, will let go of the cables, and the descent stage will zip off and crash—hopefully—far away.
Lots of moving parts, including some projectiles, obviously make this an extraordinarily complicated dance. The heat shield, parachute, and backshell all risk damaging or otherwise interfering with the landing and/or the performance of Perseverance.
Again, history provides another example of a mission failing at this point, namely NASA’s Mars Polar Lander, which, like the Mars Climate Orbiter, died in 1999 (not a great year for NASA). According to NASA, the “most probable cause of the failure was the generation of spurious signals when the lander’s legs deployed during the descent,” which “falsely indicated that the spacecraft had touched down on Mars when in fact it was still descending,” causing the “main engines [to] prematurely shut down,” resulting in the lander falling to the Martian surface.
Should anything go wrong during the landing, Swati Mohan will be among the first to know, as she’s the guidance, navigation, and control operations lead for the Mars 2020 mission. She’ll be at NASA mission control tracking the progress and health of the rover during the landing.
“Real life can always throw you curve balls. So, we’ll be monitoring everything during the cruise phase, checking power to the camera, making sure the data is flowing as expected,” said Mohan in a press release. “And once we get that signal from the rover that says, ‘I’ve landed and I’m on stable ground,’ then we can celebrate.”
Your Guide to NASA’s Life-Hunting Mars Rover, Perseverance
NASA is set to launch its next rover to Mars on July 30, in what is certain to be an exciting new…
Read more
The rover, though modeled on Curiosity, has many new features, including an array of cameras and the ability to peer beneath the surface with ground-penetrating radar. The rover will land at Jezero crater, where it will search for signs of ancient life. If life once existed on Mars, a spot like Jezero crater—a former lake and river delta—would’ve been an ideal place for microbes to hang out. In addition to this important astrobiological work, Perseverance will also study Martian weather and geology, deploy a small helicopter named Ingenuity, and collect samples for a future mission.
gizmodo.com
George Dvorsky
Saturday 9:00AM
Depiction of the Perseverance landing, with the rover still attached to backshell and retro-rockets engaged for powered descent.Illustration: NASA/JPL-Caltech
Failure could take on many forms next week when NASA’s next-gen rover, Perseverance, reaches the surface of the Red Planet. Here’s what needs to go right—and how things could quickly go sideways—when Perseverance tries to make its much-anticipated landing.
For NASA, the entry, descent, and landing (EDL) of Perseverance on Thursday, February 18 presents numerous potential points of failure. NASA has said that “hundreds of things have to go just right” for the rover to survive the seven minutes of terror. We can’t take a safe landing for granted: As NASA points out, only “about 40 percent of the missions ever sent to Mars—by any space agency—have been successful.” Which, yikes.
In a nutshell, Perseverance will have to transition from speeds reaching 12,500 miles per hour (20,000 km/hr) to a walking pace over the course of several minutes. What’s more, it’ll have to perform this autonomously, as it takes nearly 11 minutes for radio signals to reach Earth. To complicate matters, NASA is debuting two new technologies for the mission, both relating to the EDL phase and both unproven.
All three phases—entry, descent, and landing—present their own unique challenges.
Graphic showing the various stages of the upcoming landing.Graphic: NASA/JPL-Caltech
The rover, nestled inside the descent stage, will separate from the cruise stage, which, with its solar panels, radios, and fuel tanks, will no longer be required. Next, the spacecraft will have to orient itself such that its heat shield is facing forward, a task made possible by small thrusters located on the backshell. During atmospheric entry, the spacecraft’s heat shield will need to endure temperatures reaching 2,370 degrees Fahrenheit (1,300 degrees Celsius). A structural failure at this stage would be catastrophic, ending the mission before it has a chance to get started.
Indeed, previous missions to the Red Planet have failed right at the Martian doorstep. In 1999, NASA’s Mars Climate Orbiter entered into an orbit that was way too low, causing the spacecraft to burn up in the atmosphere. The failure was eventually traced to a conversion error, in which imperial units of pound-seconds were not converted to the standard metric Newton-seconds. Hate it when that happens.
Should the descent stage survive atmospheric entry, it will still have to contend with variably dense air pockets that could steer it off course. A guided entry will be performed to avoid this problem, in which the descent stage will fire small thrusters to compensate.
Graphic comparing the size of the Curiosity rover’s landing ellipse (blue) with Perseverance’s landing ellipse (red).Graphic: NASA/JPL-Caltech
The unfurling of the 70-foot-wide (21.5-meter) parachute is next. Should the parachute unfurl properly and not get tangled, the descent stage will abruptly decelerate to 1,000 miles per hour (1,600 km/h), which is still blazingly fast (remember, Mars has a super thin atmosphere). The deployment of this supersonic parachute will depend on an unproven new technology called Range Trigger, which will calculate the distance to the landing spot and trigger the parachute to deploy at just the right moment. This is expected to happen approximately 240 seconds after atmospheric entry, when the descent stage is about 7 miles (11 km) above the surface. Perseverance will bid farewell to its heat shield around 20 seconds after the parachute has unfurled, introducing another potential point of failure.
This is a critical stage—one with regrettable historical precedents. During the failed landing of ESA’s Schiaparelli mission in 2016, the descent stage prematurely ejected the parachute and heat shield, the result of a software glitch. An onboard computer thought it was just a few feet off the ground, but in reality the descent stage was somewhere between 1.25 and 2.5 miles (2-4 km) above the surface. You can imagine what happened next. The doomed Schiaparelli lander was traveling at around 185 miles per hour (300 km/h) when it smashed into the Martian regolith.
Graphic showing how the terrain-relative navigation system will work.Graphic: NASA/JPL-Caltech
With the heat shield gone, and with the rover now finally exposed to the Martian atmosphere, another new technology will kick in, called Terrain-Relative Navigation. The proper execution of this tool will be critical, as the chosen landing spot, a crater, is quite dangerous.
“Jezero is 28 miles wide, but within that expanse there are a lot of potential hazards the rover could encounter: hills, rock fields, dunes, the walls of the crater itself, to name just a few,” Andrew Johnson, principal robotics systems engineer at NASA’s Jet Propulsion Laboratory, said in a press release. “So, if you land on one of those hazards, it could be catastrophic to the whole mission.”
Here’s how NASA describes the new tool, which should allow the landing craft to determine its position relative to the surface with a degree of accuracy close to around 130 feet (40 meters) or less.
The parachute should slow the descent stage down to about 200 miles per hour (320 km/h), requiring one last step for slow down: powered descent with eight tiny retro-rockets. After ditching the parachute, the rover, still attached to its backshell, will cruise toward the surface from an initial height of 6,900 feet (2,100 meters).
Depiction of the skycrane maneuver.Illustration: NASA/JPL-Caltech
Some 12 seconds prior to touchdown, and at the very reasonable speed of 1.7 miles per hour (2.7 km/hr), it’ll be time for the skycrane maneuver. The backshell will lower the rover using three 66-foot-long (20-meter) cables, during which time the rover’s legs and wheels will move into their landing position. Perseverance, sensing an imminent landing, will let go of the cables, and the descent stage will zip off and crash—hopefully—far away.
Lots of moving parts, including some projectiles, obviously make this an extraordinarily complicated dance. The heat shield, parachute, and backshell all risk damaging or otherwise interfering with the landing and/or the performance of Perseverance.
Again, history provides another example of a mission failing at this point, namely NASA’s Mars Polar Lander, which, like the Mars Climate Orbiter, died in 1999 (not a great year for NASA). According to NASA, the “most probable cause of the failure was the generation of spurious signals when the lander’s legs deployed during the descent,” which “falsely indicated that the spacecraft had touched down on Mars when in fact it was still descending,” causing the “main engines [to] prematurely shut down,” resulting in the lander falling to the Martian surface.
Should anything go wrong during the landing, Swati Mohan will be among the first to know, as she’s the guidance, navigation, and control operations lead for the Mars 2020 mission. She’ll be at NASA mission control tracking the progress and health of the rover during the landing.
“Real life can always throw you curve balls. So, we’ll be monitoring everything during the cruise phase, checking power to the camera, making sure the data is flowing as expected,” said Mohan in a press release. “And once we get that signal from the rover that says, ‘I’ve landed and I’m on stable ground,’ then we can celebrate.”
Your Guide to NASA’s Life-Hunting Mars Rover, Perseverance
NASA is set to launch its next rover to Mars on July 30, in what is certain to be an exciting new…
Read more
The rover, though modeled on Curiosity, has many new features, including an array of cameras and the ability to peer beneath the surface with ground-penetrating radar. The rover will land at Jezero crater, where it will search for signs of ancient life. If life once existed on Mars, a spot like Jezero crater—a former lake and river delta—would’ve been an ideal place for microbes to hang out. In addition to this important astrobiological work, Perseverance will also study Martian weather and geology, deploy a small helicopter named Ingenuity, and collect samples for a future mission.
NASA Is Dropping a New Rover on Mars. Here’s What Could Go Wrong
Failure could take on many forms next week when NASA’s next-gen rover, Perseverance, reaches the surface of the Red Planet. Here’s what needs to go
gizmodo.com
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Turingsage
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Read it. In fact have read almost everyone in SF Asimov Niven etc. The best SF TV series for exceptional science , space and politics is The Expanse. Currently at season 5 but if you are new then you MUST start from season 1 . Space imagery and travel is exceptional as is the sophisticated and exciting story line.
Better, for science fans, than star trek Star wars etc as it is far more realistic and the science does not border on the ridiculous.
Must view for anyone interested in SF
Hamartia Antidote
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Hamartia Antidote
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Oh brother. I can see a ripped parachute occurring.
Perseverance Science Instruments - NASA Science
Cameras Tech Specs Main job 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 Location Mounted on the rover mast at the eye level of a 6 ½-foot-tall person (2 meters tall). The cameras...
mars.nasa.gov
AZADPAKISTAN2009
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Looks like a nice landing day , exciting stuff
newb3e
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i know but i want to see them for real!
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