Questions tagged [the-moon]

Questions about Earth's Moon. Also for questions about spacecraft, manned missions, potential missions, etc. related to Earth's Moon.

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23
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2answers
5k views

SpaceX Starship landing on Moon or Mars: why doesn't it fall over?

How does the SpaceX Starship design accommodate uneven landing surfaces that might not be stable under the weight of the vessel? I don't understand how SpaceX's Starship would be able to land on ...
3
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1answer
74 views

Which radio communication protocol will Artemis voice communications likely use?

For want of a better term, is it possible crews will use 'non-digitally modulated' radio to communicate with earth? Apollo missions had very effective communication, with a ~2.5 second 'round trip' ...
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1answer
42 views

Can I retrieve longitude of Lunar Reconnaissance Orbiter around the Moon by POST method (URL)?

I see that I can use an URL like this to retrieve position data for LRO around the Moon: https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&MAKE_EPHEM=%27YES%27&TABLE_TYPE=%27VECTORS%27&...
2
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0answers
105 views

What would happen in this cavern on the Moon?

Imagine a large cavern on the moon, around the theoretical size limit determined by Purdue university - about 1.5 kilometers high, and 5 kilometers across on the floor. This cavern is a kilometer or ...
9
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1answer
182 views

Objects that have been on the Moon multiple times

I'm reading Gene Cernan's The Last Man on the Moon and he mentioned that the flag they erected at Apollo 17's landing site had been to the Moon before: it was taken to the Moon by Apollo 11, then hung ...
2
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2answers
291 views

What are the calculations for gas transport to the Moon with a pipeline?

This paper, acquired from this question about tethers on the Moon, describes LADDER, a mission to deploy a Lunar Space Elevator (LSE). The space tether, made of Zylon fiber, would be 264,000 km long,...
43
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4answers
11k views

Why is it so hard to land on the Moon?

Successful landings on the Moon happened 50 years ago. Technology (satellites, computer, ML) has come a long way during this time, so why did Israel and India fail recently to land a probe there? Is ...
3
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1answer
72 views

Have carbonaceous chondrite meteors been found on the moon?

Carbonaceous Chondrite (C-Type) asteroids are very common. They make up about 70% of the asteroid belt, though less closer in. One would presume that a lot of them have fallen on the moon. It occurs ...
4
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2answers
290 views

Is there a list of world wide upcoming space events on the web?

Is there a list of all the international upcoming events like launches, expected arrivals at, and landings on celestial bodies, etc. on the internet ?
27
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4answers
5k views

Could Apollo astronauts see city lights from the moon?

You can see city lights from orbit on the night side of Earth. A lot of science fiction (yes, sorry...it's one of those questions) has dialogue such as "on a clear night you can see XYZ city on the ...
5
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1answer
456 views

Are there hydrocarbons on the Moon?

A recent answer suggested using "methane and other hydrocarbons" for geothermal energy recovery on the Moon. You would not need to use water [on the moon]! You could use the methane and other ...
3
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1answer
83 views

Wide angle camera of Lunar Reconnaissance Orbiter, were rectangular lenses used?

LROC WAC has two optical paths, one for ultraviolet and one for visible. Light passing through the optics is focused on a single detector. Color filters are bonded directly to the detector. One ...
5
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0answers
88 views

Orbital insertion with “inertial parachute”?

Inspired by Is there any way to land a rover on the Moon without using any thrusters?, but off-topic as a solution as that question asks specifically about crumbling zones. The idea: A spacecraft ...
21
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8answers
6k views

Is there any way to land a rover on the Moon without using any thrusters?

Is there any way to land a rover on the moon without using any thruster, with the help of Thermocol, Cotton, Bubble wrap or any other packaging material, like we can receive from online shop?
6
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1answer
255 views

Did the cold temperature of the lunar south pole cause Chandrayaan-2's on board electronics to fail?

Chandrayaan-2's lander Vikram was performing nominally during descent until about 2 km before landing, but then suddenly the communication was lost. Did cold temperature of the lunar south pole cause ...
13
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1answer
397 views

Is there any way to determine the fate of Chandrayaan-2?

The lander Vikram of Chandrayaan-2 lost contact with ISRO shortly before an expected landing. Is there any way to find out if it landed without crashing? For example, are there satellites orbiting ...
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0answers
80 views

Two consecutive high profile Moon landings fail, any common threads?

For the second time in a few months, we have seen a Moon landing fail at the last moment as computer communications failed. The Beresheet failure is well addressed here; did a similar thing happen ...
2
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0answers
48 views

OTS rechargeable battery for a lunar rover

I've been playing around with ideas for an open source lunar rover. It's based on the Stanford Doggo (video) robot. Are there commercial off-the-shelf rechargeable batteries that might work for such ...
3
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1answer
79 views

Does the moons atmosphere have any amount of human-provided xenon?

Xenon is one of the most widely used propellants for ion engines (sic)- and I also just so happened to stumble on a graph that says the moon could feasibly capture xenon into its atmosphere. Id ...
6
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3answers
3k views

slowest crash on the Moon?

Let's say I launched something into lunar orbit with minimal of propellant - just enough for trajectory corrections and then a final push to de-orbit. What is the slowest crash landing speed (both ...
2
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0answers
38 views

Does Surrey Satellite's Pathfinder lunar communications relay have customers lined up, or is it “If you build it, they will come”?

After about 24:00 in the BBC podcast Do We Need More Space Stations? BBC reporter Marnie Chesterton talks with Charles Cranston, the project manager for lunar ...
2
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1answer
102 views

Which camera has produced this image from Longjiang-2 microsatellite?

Here is an image of this lunar micro-satellite taken in 2018, from this tweet, found in this comment below the question What is the most recent photo taken from the Moon surface as of August 2019? In ...
5
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1answer
559 views

moon structure ownership

Lets say I made a robot with a bunch of tools and landed it on the Moon (Luna). Then using remote control I instructed a robot over video/control channel to extract some resources (metals, oxigen, ...)...
1
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1answer
109 views

When will the first Falcon-9 send something to the Moon? Will it be iSpace's HAKUTO-R?

The Teslarati article SpaceX customer iSpace updates Falcon 9-launched Moon lander, rover plans says Japanese commercial space company iSpace has provided an updated schedule for its first private ...
3
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1answer
209 views

Will the Artemis lunar landers provide some privacy?

As we learned in Did astronauts on the moon poop in front of each other the Apollo lunar landers provided no privacy. The Artemis missions will have members of both sexes, so privacy becomes a bit ...
6
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1answer
490 views

Why were blood and hair follicles from 25 people put on the Moon?

The Wired.com article A Crashed Israeli Lunar Lander Spilled Tardigrades on the Moon says: Spivack had planned to send DNA samples to the moon in future versions of the lunar library, not on this ...
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0answers
67 views

Lunar contamination by tardigrades [duplicate]

According to this tweet the recent crash of Beresheet on the Moon could have spread tardigrades on the Moon surface. Isn't this a violation of the agreement on preventing contamination of outer ...
3
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1answer
130 views

Why send tardigrades to the moon if we have actively avoided contaminating other worlds? [duplicate]

In 2017, we sent Cassini crashing into Saturn to avoid contamination "The spacecraft will burn up and disintegrate like a meteor in the upper atmosphere of Saturn," Preston Dyches, of NASA's Jet ...
50
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3answers
15k views

Did Apollo leave poop on the moon?

If you google the question, you will find an abundance of sources discussing the alleged fact that the Apollo missions left bags of fecal matter on the moon. A conversation on reddit got me looking ...
19
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1answer
3k views

How was the cosmonaut of the Soviet moon mission supposed to get back in the return vehicle?

In the Soviet Moon mission, for which the ill fated N-1 launcher was built, we know that the cosmonaut responsible for landing on the moon was to transfer from the equivalent of the command module to ...
7
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1answer
373 views

Why is the Apollo LM landing gear covered with so much thermal insulation?

The Apollo LM landing gear – struts, footpads, shock absorbers and contact probes was completely covered with foils. There should be no temperature sensistive electronics within the landing gear, ...
23
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2answers
5k views

Were there any unmanned expeditions to the moon that returned to Earth prior to Apollo?

Apollo 8 orbited the moon, and obviously Apollo 11 landed. I'm wondering if there were any test missions to get unmanned ships to the moon and safely back to Earth? It seems like a big jump to ...
2
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2answers
107 views

How fast were the Lunar Command Module and Landing Module traveling around the Moon when they reconnected?

I can't find this information online and am wondering how fast each were going around the Moon when they reattached to one another after the moon landing.
2
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1answer
87 views

Was there a measurable effect on gas concentration on the Moon during the Apollo missions?

Gas was released by the Apollo Lunar Modules during depressurization of the cabin in preparation to an EVA. Did this release of oxygen had a measurable effect despite the small amount of gas and the ...
0
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2answers
117 views

Why do we not have ten small rovers on the Moon already? [closed]

We already did the develop and testing of Opportunity and Curiosity for 15 years. Why not crank out ten more, and put them on a Falcon heavy for the Moon's south pole?
1
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1answer
91 views

What exactly is a “Next Generation Lunar Reflector”? Difference in design and performance?

Space.com's 50 Years After Apollo, India Is Carrying a NASA Laser Reflector to the Moon (And It's Only the Start) is a little confusing because it talks about three retroreflectors: - Apollo era ...
3
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1answer
117 views

How long will traces of the moon landings survive?

Inspired by this question: How long will traces of the moon landings (e.g. footsteps, the hardware) or other human activity on the moon approximately survive to be recognized as unambiguous evidence ...
39
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6answers
7k views

Why did Saturn V not head straight to the moon?

This may seem a naive question, but as I understand it one of the reasons for the enormous energy expended by rockets is the extremely high speed (around 28,000kph) you need to reach to achieve a ...
15
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2answers
2k views

Importance of moon phases for Apollo missions

I learned that Apollo 11 landed at half moon and that Apollo 8 circled the moon at new moon. How important were the moon phases for the Apollo flights?
8
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2answers
343 views

Why is there no video of the first steps of Apollo 16 and 17?

In doing research in to the first words said on the surface of the various Apollo astronauts, I found there was no video of Apollo 16 and 17, at least until they had been on the surface for a while. ...
4
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3answers
138 views

Options for making rocket fuel using the Moon's natural resources

Based on what is known about the chemistry of the lunar surface through remote sensing and surface exploration, what raw ingredients are likely to be available that can be used to make rocket fuel?
1
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1answer
63 views

Is there likely to be much nitrogen in the Moon's inner crust?

Is there likely to be much nitrogen in the Moon's inner crust? My thinking is that if we can extract enough nitrogen from the moon, we may be able to build a Terran space elevator out of Kevlar ...
1
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1answer
105 views

Lunar lander reaching orbital velocity to dock with the orbiter for return to earth

I'm new to spaceflight, is it possible to explain in a clear way the following? When returning from the Moon's surface with the astronauts to the 'mother' ship for return to earth, how can lunar ...
1
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1answer
100 views

Where can I find simple-ish math(s) about Moon launches from Earth and fuel consumption etc.?

I'm intrigued by the idea of launching from the top of a space elevator perched on the top of a Ecuadorian mountain, launching Eastwards to take advantage of Earth's spin. I'd like to just understand ...
7
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2answers
977 views

What was the temperature of the Apollo 11 moon landing zone?

It's soon 50 years from the Apollo 11 moon landing, so in honor of that event, I decided to post a question here. I understand that moon has due to its long day and long night and also due to the ...
11
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2answers
3k views

Could the crash sites of the Apollo 11 and 16 LMs be seen by the LRO?

This BBC article mentions that the crash sites of the Apollo 11 and Apollo 16 Lunar Modules are unknown. The Lunar Reconnaissance Orbiter has mapped most of the moon’s surface at 100m resolution and ...
8
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1answer
304 views

What is Buzz Aldrin's T.O.R. plan? How does it work?

Buzz Aldrin is recently quoted in Ars Technical's Buzz Aldrin is looking forward, not back—and he has a plan to bring NASA along: “This T.O.R. plan may be the most important thing I’ve ever done in ...
2
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1answer
148 views

How exactly does this Apollo astronaut's tool work? What was it called?

The BBC News article Apollo in 50 numbers: Weights and Measures shows the following photo with the caption: The astronauts brought back more than 360kg (790lb) of Moon rocks for study on Earth (...
4
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1answer
144 views

Why exactly would “permanently shadowed polar lunar craters… have substantially higher levels of ³He than sunlit lunar surfaces?”

Researching this answer led to ³He in permanently shadowed lunar polar surfaces published in Icarus. The abstract is tantalizing but terse: Abstract Because of their cryogenic temperatures, ...
4
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1answer
73 views

How long does it take to refresh helium-3 on the moon?

I was reading a science-fiction novel, Limit, by Frank Shätzing. It depicts a near-future with useful helium-3 fusion, and the Americans and Chinese are bumping elbows mining helium-3 on the moon, ...