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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NASA, SpaceX, Boeing [closed]

NASA are working in partnership with SpaceX and Boeing for the manufacturing of space craft to carry NASA astronauts to the ISS, but they have decided to build the spacecraft "Orion" and &...
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Full lunar mineralization/ore map

This is really quick I'm searching for a full complete ore map of the moon, I found this: But, as you can see, is impossible read.
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Why it's news that SOFIA found water when it's already been found?

Back in 2008, India proved water on moon. India's ISRO spacecraft Chandrayaan-1 released the Moon Impact Probe (MIP) that impacted Shackleton Crater, of the lunar south pole, at 20:31 on 14 November ...
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Lunar landing in cotton candy?

When spacecraft land on Earth, they use the atmosphere to slow down. On the Moon there's no atmosphere, so spacecraft must instead use rockets to slow down from orbital velocity. Would it be possible ...
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What are the nuclear energy challenges specific to the moon?

What are moon specific hurdles to a fission reactor? low gravity no atmosphere Apparently it's more difficult to shed heat in a vacuum. Are some coolants more advantageous on the moon than others? ...
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1answer
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Microwave drive for cubesats

Theory: how is this? I was doing a lot of research about the EmDrive thruster, i find 50% papers says that it work and other 50% saying that the "thrust" is a product of the interaction with ...
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Does mass of orbiting body affect the orbital speed? [duplicate]

Does mass of orbiting body affect the orbital speed? Suppose if Moon is at same distance from Earth as International Space Station. Would Moon's orbital velocity change? Also secondary question, ...
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What is the closest polar lunar orbit that can be sustained? What are the limiting factors on closest approach?

I'm wondering how close a lunar orbit can get at periapsis to the south pole. I want an orbit that is sustainable for at least ~20 orbits. I'm working on a small sat concept for studying the lunar ...
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What's the realistic top speed for a manned lunar rover of the future along the lines of the one that Toyota is designing for JAXA?

I'm curious about how fast a large, enclosed, manned lunar rover could feasibly travel. Toyota hasn't said yet what the top speed will be for the one that they're developing for JAXA, but that's the ...
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What magnitude stars were seen from lunar surface?

I've seen a claim* that some of the Apollo astronauts stepped into the shadow of the LM, raised their gold visors, and looked up into the sky to see the stars. If this is true any mention of what ...
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Will mining water on Bennu not be more economical than collecting it near the south pole of the Moon?

Bennu is a carbonaceous asteroid that is currently accompanied by the OSIRIS-REx spacecraft that will take samples from it to return to Earth. Its diameter is 490 m. and it is slightly denser than ...
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Why would such a powerful computer (or a computer at all) be needed to go to the Moon?

I keep hearing people say things like: Duuuude! It's so insane that we're carrying around phones in our pockets that are a thousand times faster than the computers that took us to the moon! Why do ...
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How many times will the Photon fire its Curie in order to “reach the right spot” to deploy CAPSTONE towards the Moon?

The Verge's How small launcher Rocket Lab plans to pull off its first mission to the Moon next year says (though this has since been addressed†): Photon is going to need it all in order to get NASA’s ...
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How to calculate how deep a crater on the Moon has to be to have liquid perfluorodecalin on its floor?

Because the Moon has no atmosphere, one could be created by the sublimation or evaporation of a solid or a liquid respectively, within a deep crater if the gas would not flow over the rim. ...
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Is an electric fuel tug from LEO to moon orbit economically feasible?

Does it make economical sense to use an electricaly powered fuel tug to supply a moon landing program with fuel? I am imagining an architecture of launching a 25t payload of mostly fuel into LEO which ...
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Is lunar sample return comercially viable for a private company?

Moon samples like rocks and dust are highly valuable and sought after and impossible to get legally as a private individual, because of the fact that USA owns all of the samples in existence, from the ...
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228 views

What was Apollo “Moon rope” made out of? Was it ever used?

This excellent answer to Did Conrad and Bean balk at entering the 650-foot-wide Surveyor Crater, or just express concern? What data had they seen? contains several references to a 30 foot length of &...
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Did Conrad and Bean balk at entering the 650-foot-wide Surveyor Crater, or just express concern? What data had they seen?

The New York Times' The Moon Is a Hazardous Place to Live says: Throw in the intense contrast between light and dark — unlike anything we see here on Earth — and those changes in the terrain can play ...
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Are there any possible proxies for dust accumulation on the retroreflectors on the moon?

New York Times' How Do You Solve a Moon Mystery? Fire a Laser at It links to the new open access paper First two-way laser ranging to a lunar orbiter: infrared observations from the Grasse station to ...
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Getting back from the Moon

This link describes the way back from the Moon surface to the orbiting spacecraft. But how could that spacecraft get back to the Earth? It is a long journey. How much rocket fuel would be needed, in ...
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Is Earth's Moon gaining or losing mass?

The Earth gains mass from dust/meteors (and a tiny, tiny bit to increasing temperatures/energy), but loses mass from hydrogen/helium escaping and nuclear reactions. It's estimated to have a net loss ...
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Riding a bike on the moon

I noticed that some astronauts do things in space they always wanted to do - like Chris Hadfield playing the guitar on the ISS. I (like many other children ^^) wanted to become an astronaut pretty ...
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Could a steam engine work on the moon? [closed]

Recently, there was a thread on Hacker News about building a nuclear power plant on the moon. Humans being what they are, I could imagine some dark outcomes. Instead could we build a steam engine on ...
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How long could an Oxygen/Nitrogen atmosphere last on the Moon?

So, if the Moon had an atmosphere, composed of Oxygen and Nitrogen, how long might it last before it all boiled off into space due to the low gravity of the Moon? Or better yet, a Krypton or Xenon ...
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Roughly express how much of our Moon's apparent libration amplitude seen from the Geocenter is due to different effects?

My understanding is that when tidal locking of a body first happens it transitions from a state where the average rotation period is faster than the orbital period to a state where they are the same ...
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Why are lunar orbits unstable?

I've seen a few times now that objects in orbit around the moon tend to crash into it in relatively short time frames. The orbits tend to become more elliptical until they intersect the surface, is ...
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How is it proposed to extract oxygen from lunar regolith?

Futurism's news item NASA Pumps Funding into Startup That Says It Can Harvest Oxygen From Lunar Regolith says: NASA just awarded substantial funding to Pioneer Astronautics, a company that claims it ...
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184 views

What does lunar dust smell like?

What does dust from the moon smell like? Please support your answer with sources.
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Is it legal to steal the American flag from the moon?

I'm not quite sure whether the question is correctly answered here or whether it belongs to Law Stack Exchange. Assuming I can fly into space, more precisely to the moon and back again. What laws ...
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Delta-v difference between Mars and Moon

Considering a simple Hohmann transfer, does it take less Delta-v and propellant to go to Mars than to the Moon
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Would there be snow, rain, fog or clouds in a deep, sealed, subsurface cavern on the Moon if water were present?

The question Most efficient method of storing energy with water on the moon? proposes a several hundred meeter tall subsurface cavern on the Moon. I added the following comment to an answer: I keep ...
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1answer
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Most efficient method of storing energy with water on the moon?

I found a large cavern under my lunar homestead. It is several hundred feet (a couple hundred meters) deep and fairly large. There is a large ice deposit at the bottom. I am able to warm it to ...
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History of investigation of lunar and Martian surface gravity

I wonder when it was discovered that the Moon has about a sixth of the Earth's surface gravity and that Mars has 0.38 g. I think that until Newton, everyone assumed there was the same gravity on every ...
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Why not Super-Draco in lunar lander?

The Super Draco rocket motor was originally developed for propulsive landings on earth, right. It has performed great in the test where crew dragon escaped from the Falcon 9 last year. It is supposed ...
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Is there a certain plan on how Houston will talk with the Artemis 3 crew?

Artemis 3 is going to land on the Moon's south pole, on the far side of the Moon. Therefore, before launching the crew to the Moon, NASA must put (a) communication satellite(s) either into lunar orbit ...
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What are the advantages of building a human colony on the Moon vs Mars?

The opposite question, What are the advantages of building a human colony on Mars vs the moon? was asked yesterday. I thought it made sense to ask this version as a corollary. As noted in the other ...
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What are the advantages of building a human colony on Mars vs the moon?

Why would humans try to establish a colony on Mars rather than on the moon? Seems to me that both bodies are similarly inhospitable, yet the moon is so much easier to reach (and we should be able to ...
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Did Streptococcus mitis survive 950 days in the lunar environment?

The "Apollo 50th" account on Twitter tweets news and events day-to-day as they happened 50 years ago. Yesterday, the following information has been tweeted: The microorganism Streptococcus mitis ...
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Why are there mountains/mounds in the centre of craters on the lunar surface?

From clear images of moon's surface we can see many of the craters have small mountains/mounds (or montes) in the centre. So, what is the mechanism behind the formation of these mountains and which ...
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Why did Apollo 11 land at the sea of tranquility?

As we all know in 1969 Apollo 11 landing made history but, why did it land specifically at the sea of tranquility also known as Mare Tranquilitatis. Probably they would have chosen this because of ...
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How much silver was left on the Moon by Apollo Lunar Modules?

Both the descent and ascent stages of the Apollo Lunar Module were powered by silver-zinc batteries. Source: Apollo Lunar Module Electrical Power System Overview The total weight of these batteries ...
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Is it easier to take off from the moon or earth? [closed]

how much mass does the moon have? how much mass does the earth have? how much force needed to leave earth how much force needed to leave the moon
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How to design a lunar flyby trajectory in GMAT?

I am trying to design a flyby mission to the moon using electric propulsion on GMAT. I've gone through the tutorials, however, the most useful one "Lunar Flyby to the moon using multiple shooting" ...
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Are there any crewed missions planned or designed for high orbit/cislunar space?

We talk a lot about going to The Moon again, but what about very high Earth orbit, say geostationary and beyond? Are there any plans for crewed missions? If so, what would their goals have been? ...
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How can I generate Chebyshev cofficients from SPICE for J2000 Inertial to Moon ME Frame?

I want to extract the Chebyshev coefficients in order to be able to calculate the time-varying transformation from the ICRF / J2000 Inertial frame to the Moon ME (moon mean earth) frame. I know I can ...
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What is the maximum thrust a pressure-fed methalox engine can produce?

SpaceX revealed on 4/30/2020 a new version of Starship designed to land humans on the Moon. Auxiliary engines are mounted high on the body for the last part of the descent, apparently to eliminate the ...
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How do the Dynetics-led team's ALPACA lander's “drop tanks” rendezvous and jettison work in terms of trajectories?

Ars Technica's NASA awards lunar lander contracts to Blue Origin, Dynetics—and Starship says: NASA announced Thursday that it has awarded three contracts to begin initial development of lunar ...
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Why did the Apollo lunar missions not let all astronauts at least set foot on the Moon's surface? [duplicate]

All Apollo lunar missions had a third crew member who remained on board the command module. Source: https://en.wikipedia.org/wiki/Moon_landing#Crewed_landings Imagine being the guy who has to risk ...
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What was the point of the laser reflectors which were placed on the Moon with the Apollo landings? [closed]

Until today, I had never once heard anyone ever mention these "reflectors" which apparently were placed on the Moon at the landing site in order to verify from Earth that humans were there. On https:/...
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What is the slope of the sides of Aristarchus crater on the Moon?

The question If you fell into a crater on the moon in your spacesuit and no jetpack, is there a way to use low gravity to get out of the hole? mentions Aristarchus crater as an example. It's a pretty ...

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