Questions tagged [rovers]

Questions about vehicles sent to extraterrestrial bodies, generally for use in data collection.

Filter by
Sorted by
Tagged with
13
votes
4answers
6k views

How can electronics on board JWST survive the low operating temperature while it's difficult to survive lunar nights?

Compared to the temperatures encountered in lunar nights, the desired operating temperature of the James Webb Space Telescope is very low. Lunar nights are typically -170°C while the operating ...
5
votes
2answers
539 views

How much wax is on the Moon? (Lunar Roving Vehicles)

I found the Cody's Lab videos from Scott Manley's video as described in this answer. Browsing through I learned from the first 30 seconds of Hot Wax Bottle? that the phase change of wax was used on ...
3
votes
1answer
72 views

Long lived solar powered rovers without radioisotope heater units (like Zhurong), for use beyond Mars

The Yutu rovers use RHUs to stay warm and survive the two week long lunar nights, every other rover uses nuclear material as well (except Sojourner), but the Zhurong rover uses a novel storage-heating ...
4
votes
0answers
29 views

How many solar system bodies have had their magnetic fields directly measured?

Discussion below this post lead me to wonder: Question: How many solar system bodies have had their magnetic fields directly measured? Inferences from radio or spectroscopic observations don't count ...
1
vote
0answers
56 views

Do Curiosity and Perseverance have gyrocompasses? Has any rover had one? If so, what kind and how do they work?

There is discussion of a gyrocompass in comments on the page How does Curiosity know how to point and move it's high gain antenna in real time? but so far I don't think there is a hard "Yes&...
4
votes
2answers
201 views

Do lunar rovers on the near side of the Moon need a relay communication satellite?

Wikipedia says direct communication is not possible from the far side of the moon. So I'm guessing it should be possible for the satellite to communicate directly without relay satellite from the near ...
7
votes
0answers
85 views

Is lunar exploration going to need a whole heck of a lot of RTGs? If so, have they started firing up the RTG-making reactors yet?

The November 16, 2021 Northrop Grumman Press Release Highly specialized team to design vehicle for sustainable lunar surface mobility operations begins Northrop Grumman Corporation (NYSE: NOC), is ...
6
votes
5answers
3k views

Methane internal combustion engines for rovers on Mars and Moon. Feasibility?

It seems possible to produce methane and oxygen from the atmospheric CO2 and icy soil on Mars, and from icy regolith in the polar craters of the Moon. It has been suggested that CH4+O2 could be used ...
7
votes
2answers
261 views

How will the Exomars rover communicate back to Earth?

I see here that the Exomars rover has only two UHF monopole antennas. Two UHF monopole antennas are used to communicate with Mars orbiters, including the Trace Gas Orbiter. Does it mean that it ...
5
votes
0answers
60 views

Were there backup routes planned for the Apollo LRV?

I just finished reading "A Man on the Moon" by Andrew Chaikin, an amazing read. For the missions involving the Lunar Roving Vehicle (LRV, Apollo 15-17), there are some mentions of astronauts ...
4
votes
2answers
710 views

Why can't the VIPER lunar rover recharge its 100-day power source using its solar panels?

update 1: NASA wants ideas for keeping Moon missions powered in the dark update 2: NASA’s Artemis Rover to Land Near Nobile Region of Moon’s South Pole which is informative here Source NASA ...
2
votes
0answers
93 views

At what inclined grade would Curiosity or Perseverance require twice the electrical power to drive compared to driving on flat terrain?

Motors have losses and friction, and compaction of soil by a rovers wheels are lossy as well. Driving over bumps/topography requires extra work going up that isn't recovered when going back down. The ...
5
votes
1answer
77 views

Did Perseverance visit South Seítah?

This summer, Ingenuity found a track that could yield interesting science results. Has Perseverance driven down South Seítah yet? If not, has the possibility of sending Perseverance there been ...
1
vote
1answer
162 views

What connection do Mars rovers use to send data to Earth?

How do Mars rovers send data back to Earth? Do they have some kind of built in WI-FI routers or is there any other connection?
5
votes
0answers
171 views

What are the maximum data capacities of the active rovers on Mars?

Many rovers have been sent to Mars and, as now, some are still working there. Does anyone know the maximum data capacity of each active rover? Curiosity Perseverance Zhurong
3
votes
1answer
285 views

Where will the sample tubes on Perseverance be stocked?

Will these sample tubes stay on the rover itself? Or will they be put on the surface of Mars? This latter way does not make sense to me. Squirrel effect: how could a future rover find them? Storms on ...
3
votes
0answers
77 views

Why did the last two NASA rovers land in craters?

Perseverance landed in Jezero crater, Curiosity in Gale crater. Do craters have any specific properties that make them desirable landing sites for rovers?
1
vote
0answers
54 views

Moon Buggy Can Ride again? [duplicate]

we all know on the moon there are 3 Moon Buggy's. If we go back to moon again some how find one of Luna rovers from 3 in moon will it be running condition if we give some Repairs?
3
votes
1answer
151 views

Which is currently further from their landing site: Ingenuity or Perseverance? How far away are they from each now?

Ingenuity has flown seven times now and I'm not certain but I think for at least one of the flights it traveled some distance and landed in a new site. Perseverance has done some traveling as well. ...
2
votes
1answer
117 views

How bright is twilight on Mars compared to Earth?

The surprising answer to How much more quickly does night come on Mars compared to Earth? Will it be easier to see Mercury there? is "up to two hours(!)" "...indicating that Martian dust extends very ...
3
votes
1answer
133 views

In their first 100 sols which NASA Mars rover drove the furthest and which one the least?

It seems we've passed the 100 day/sol mark for Perseverance. Perseverance and Curiosity are comparable in designs but have had significantly different short term goals; Curiosity was the first of it's ...
2
votes
3answers
386 views

When was stereoscopic photography first used intentionally on solar system body?

I have stumbled across the fascinating page Photogrammetric Analysis Of Apollo 11 Imagery: New camera-station map with improved locations at the following website: https://www.hq.nasa.gov/alsj/a11/...
7
votes
1answer
121 views

Have various lunar rovers known their own position on the Moon? If so, how?

Given that there is no satellite navigation on the Moon, have lunar rovers figured out their current location on the surface of the Moon? If so, how? For the ones that have, did they send pictures ...
8
votes
2answers
472 views

What was it actually like driving the Lunokhod lunar rovers live from the ground? What were some of the biggest challenges?

This answer to How (the heck) did Lunokhod 2 drive, navigate and survive a ~40 kilometer drive over four months on the Moon using 1970's technology? discusses some of the technologies that made this ...
9
votes
0answers
184 views

After nine years on Mars, has anything on Curiosity broken yet?

As per Wikipedia's Curiosity (rover), it landed nine years ago today at 6 August 2012, 05:17:57 UTC. This is yet another testament to NASA spacecraft reliability. Since landing, has anything actually ...
1
vote
1answer
101 views

Have lunar (or martian) rovers exploited shadows, perhaps for terrain comprehension or obstacle avoidance?

This answer proposes that light bars would be better than a single headlight for night time navigation on the Moon because a single headlight will generate hard shadows. Considering this is exactly ...
3
votes
1answer
92 views

Does curiosity's RTG generate neutrons as this NASA CheMin X-ray detection system webpage suggests? If so, how?

mars.nasa.gov's CheMin for Scientists (found here) says (about half-way down): Detection of X­-ray Photons by the CCD CheMin will use a 600 × 600 E2V CCD-224 frame transfer imager operated with a 600 ...
5
votes
2answers
457 views

What are these details on (renderings of) the Zhurong rover's wheels?

Looking at some renderings of the CNSA Zhurong rover I noticed some curious (pun intended) details on the wheels: This Newsy Today article: In this The Conversation article: seen in some clips of ...
12
votes
3answers
927 views

Does new technology make it advantageous to have walking rovers?

Watching Boston Dynamics progress with their walking robots makes it seem like maybe a version adapted to function off-world could compete with wheeled rovers now: ...
8
votes
1answer
938 views

How does Curiosity know how to point and move it's high gain antenna in real time?

The Curiosity rover has a compact X-band high-gain antenna (HGA) that allows for low data rate communication directly with Earth, but is used though for higher data rates it usually uses UHF to ...
2
votes
1answer
194 views

Is there any way to tell which NASA rover this "rover" might be modeled after?

In the OK Go! YouTube video linked below, there is a generic model of a planetary rover with a NASA logo on it. It has six wheels, (four on one articulated carriage) a vertical mast with a T-shape on ...
4
votes
2answers
494 views

Are Perseverance's wheels really this big?

Business Insider's What is it like to drive the Perseverance rover remotely? A NASA engineer explains the challenges of piloting the vehicle's journey across Mars. includes the following: (Heather ...
6
votes
1answer
761 views

Who discovered "Egg Rock"? The Curiosity rover or people?

"Egg Rock" is a smooth, shiny nickel-iron meteorite found sitting on the surface of Mars on Curiosity's Sol 1505, or 30-Oct-2016. It is described the next day in Arizona State University's ...
16
votes
2answers
3k views

Why don't we send a rover to a pole of Mercury?

Mercury is among the least explored planets, despite its vicinity to Earth. Just two probes have been sent to Mercury, a third one is underway and no probe landed softly on Mercury so far, Messenger ...
4
votes
1answer
338 views

Download all Perseverance Raw Images

I want to make an archive of all the Raw Images Percy will make during her mission. I would love to have separate folders for each Sol. The plan is to run a script which then grabs the images from the ...
2
votes
1answer
215 views

Venus probe with refrigerated electronics powered by an RTG (more like the Mars rovers)

Because of the very high surface temperatures on Venus (~450 oC) conventional semiconductor electronics will not work. Discussion of surface probes to Venus talk about using vacuum electronics, ...
2
votes
0answers
43 views

Has any rover dragged a magnet across martian soil to see what gets picked up? Any magnetic measurements of specific rocks or particles of any kind?

On Earth, amateur and sometimes professional scientists collect dust from the tops of buildings or mountians (see also) and separate it with a magnet to obtain meteoric material. Not all meteoric ...
0
votes
1answer
68 views

How cold do Curiosity's & Perseverance's appendages get at night with all those sensitive cameras and lasers?

cropped from PIA19920: Curiosity Self-Portrait at 'Big Sky' Drilling Site MastCam-Z, ChemCam/SuperCam and MAHLI are optical systems and ChemCam includes a telescope and a pulsed laser, but the ...
9
votes
9answers
1k views

How could a fast powerful rover on Mars be powered electrically?

Background The rovers on Mars are slow and weak. If I am to believe what I read, MSL Curiosity only produces 1/6th of a horsepower electric effect, 125 watt. In order to perform tasks like deep ...
27
votes
3answers
7k views

Why exactly do robots freeze? How could we engineer around it?

Moon and Mars rovers go through a lot of trouble to keep themselves heated to avoid "freezing to death". My question is why exactly are all these measures necessary? As in, which components ...
8
votes
3answers
238 views

What "flickering goggles" do JPL scientists rely on to explore the Martian surface "in genuine 3D"?

Gizmodo's NASA Is Using Red and Blue 3D Glasses to Safely Drive the Mars Rover While Working From Home says: To safely navigate the Curiosity rover across the surface of Mars, over 120 million miles ...
2
votes
2answers
272 views

What is inside Perseverance? Is the only scientific payload the bunch of instruments hanging from the arm?

Perseverance weighs about one ton, it is as big as a car. But what is inside the vehicle that weighs so much? Is the payload only the instruments hanging from the arm? Is all the remaining hardware (...
5
votes
1answer
309 views

On what kind of martian soil or rock will the Perseverance rover drop its helicopter?

The image below is cropped from the high resolution version of NASA's Mars Helicopter and Perseverance Rover PIA23824 and shows the helicopter in it's stowed position on the underside of the rover ...
7
votes
2answers
636 views

Perseverance Rover to drive carefully for months while helicopter hangs from underside?

The image below is cropped from the high resolution version of NASA's Mars Helicopter and Perseverance Rover PIA23824 and shows the helicopter in it's stowed position on the underside of the rover ...
1
vote
3answers
336 views

Would a circular saw on one arm and a trowel on another on the Mars 2020 rover add scientific value? [closed]

Edit: I changed the question from one arm with a shovel to two arms, with one with a circular saw and the other with a trowel, some time after the first answer of @Hobbes. I did this because in his ...
9
votes
1answer
248 views

What are those plastic hoses on Perseverance used for?

I've been trying to find out what this plastic tube is for that got cut during descent. It's a single tube so as far as l can tell not a loop. It ends in the lower right corner of the body (in the ...
3
votes
0answers
45 views

Could a Mars rover reliably navigate using the local magnetic fields?

Mars does not have a global magnetic field which guides charged particles entering the atmosphere. Mars has multiple umbrella-shaped magnetic fields mainly in the Southern Hemisphere, which are ...
4
votes
1answer
58 views

When will SuperCam examine its first target?

The Perseverance rover just landed yesterday. I'm guessing that there first are some checks to do on the rover itself before it starts to do any science, so the science instruments like SuperCam might ...
32
votes
6answers
8k views

Why are there so few lunar rovers?

I'm a big fan of Curiosity and Opportunity, the Martian rovers. The science is over my head, but the images they've captured are mesmerizing. It seems unusual to me that we have two active Martian ...
12
votes
3answers
1k views

How did Lunokhod 1 become "lost" in 1971; in what ways did astronomers "look for it" after that?

The Smithsonian Magazine article Lost Soviet Reflector Found on the Moon says: There are actually five retroreflectors on the Moon: three placed by Apollo astronauts and two that sit atop Soviet ...

1
2 3 4 5