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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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10answers
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Which is closer to Mars, Earth or the Moon?

Which is closer to Mars, Earth or the Moon? I'm writing a novel and I'm so grateful for the wealth of information. The only answers I find refer to Phobos and Demos Mars moons.
1
vote
1answer
231 views

Segways on the Moon?

Looking through NASA Johnson's Flickr I saw this photo. The complete caption is shown below. What are these? How do they work? Are those tractor wheels at the bottom? Why are they orange and so ...
18
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4answers
3k views

Can we set up an orbiting transporter between Earth and the Moon?

I will give an example with the moon. If some spacecraft is put either in orbit around both earth and moon or in highly eccentric orbit that intersects with the moon orbit, some other spacecraft can ...
8
votes
2answers
412 views

How can debris from an impact escape to a stable orbit?

Please help me understand: As far as I understand it, when an object gets thrown off the surface of a planet by an impact and doesn't reach escape velocity it is on a suborbital trajectory and ...
3
votes
1answer
183 views

Why aren't there carbonate rocks on the moon?

I read in a lot of places that for some reason the moon lacks carbonates, and thus carbon. Part of the reason seems to be the lack of biological origin and cycles. But are there no other sources for ...
3
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1answer
184 views

Moon craters. How deep do they get?

Ive always wanted the answer to an specific question as you saw in the title "How deep does the moon craters go". Please leave your answers down below possibly link a good source.
3
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1answer
129 views

How to draw a picture on the surface of the Moon so it could be visible for 100 million years? [closed]

I am interested in long-term data preservation on the Moon in style of Lunar Mission One. To attract the attention of the next civilization on Earth to the message, I think that a beacon similar to ...
4
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1answer
917 views

Where can I find “Space policy directive 1”?

Today, as per the tabloids, President Donald Trump signed the "Space policy directive 1". Where can I find the original/raw document? (I get the gist from the tabloids, but wanted to read the raw ...
3
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2answers
2k views

With today's technology, how much would it cost to put a man on the Moon again? [closed]

Has there been any current estimates for the cost of putting a man on the moon, today? I'm curious how much the price has dropped with the improvement of technology, compared to the original moon ...
6
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1answer
1k views

Is the Uphoff-Crouch cycler orbit with 3 passes impossible?

A previous question I asked here got clarification on the Earth-passing phases of the Lunar Cycler orbits that use the "backflip" maneuver. It came up in the book Artemis, and it used the name Uphoff-...
3
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2answers
460 views

Bombing Moon and Mars: What would it look like?

To me it seems surprising, frightening, and sadly typical that before humans set foot on a celestial body, they plan to nuke it (1, 2, 3). What would a big explosion on Moon or Mars look like? I ...
5
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0answers
120 views

Does NASA, or any other group, have any plans to directly explore caves on Mars or the moon?

The importance of Martian caves for life past and present, volatiles being trapped, and for future habitats would seem to put their exploration high on the list but I don't see any missions to do so. ...
12
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2answers
886 views

Who was the first person to touch the moon rocks?

This might be a stupid question, but I can't find and don't know the answer: Everyone knows that Neil Armstrong and Edwin "Buzz" Aldrin were the first men to land on/ walk on the moon. But were they ...
0
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1answer
532 views

How much energy would it require to get the ISS to the moon? [duplicate]

How much energy would it require to get the ISS around or on the moon? And how much fuel would that require? And how many cargo missions would that require? And if that is not worth it, would it be ...
8
votes
1answer
313 views

How livable would a lunar lava tube be?

Assuming the recently discovered lava tube is exactly what scientists think it might be, and assuming you could build 2 walls and a door in side the lava tube, and assuming you filled it with a ...
22
votes
1answer
314 views

How deep could a lunar mine go?

Mine shafts on earth are limited in how deep they can go by 2 things, internal heat and rock pressure. The deepest mine on earth currently is just under 4 kilometers. There is internal heat on the ...
3
votes
1answer
173 views

How did the JAXA lunar probe discover that there is a 50 km long cave on the Moon?

Breaking Space news! I just heard a short item on the BBC news broadcast (ok, podcast). It said that a JAXA lunar orbiter has determined that a previously identified cave is quite extensive - perhaps ...
7
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3answers
2k views

Lunar excavation by blasting - would there be unique challenges, difficulties or safety issues?

This answer which mentions blasting on the moon for excavation got me thinking. There may be many ways that blasting could potentially be useful on the Moon. Excavation for habitats or other ...
7
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1answer
242 views

Lunar launch pad cooling

I read recently about the huge volumes of water that is sprayed on a launch pad during lift off. I remember it to be about four times as much water as fuel burned. This is done to reduce noise (energy ...
15
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5answers
2k views

Would Luna 15 have been visible to any of the members of the Apollo 11 crew?

According to Wikipedia, Luna 15 crashed a few hours before Eagle lifted off from the moon, and since it crashed North-east of the landing site, it must have overflown them. Would any of the crew have ...
7
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2answers
2k views

Can five refillings of the BFR second stage be useful to get to the Moon? To Mars? All five in Earth orbit?

EDIT: Here are some BF numbers from the video: ...
3
votes
2answers
356 views

Space Ship capable of travelling from Earth to Moon and back

What would be required to have a vehicle like the space shuttle in that it could launch from earth and travel through space and was reusable except that it also possessed the capability to land on the ...
2
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0answers
107 views

Would the lunar rovers work (again) today? What would be needed? [duplicate]

3 Apollo missions brought their lunar rovers (Lunar Roving Vehicle) LRV with them, and they remained on the moon. Some of them have broken parts, and their batteries seem to be emtpy, according to ...
30
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2answers
5k views

How did the Lunar Module dock with the rest of Apollo 11 and what is the “CSM”?

I'd like to ask if anyone can, in layman's terms, describe the procedure by which the Apollo 11 astronauts were able to get back to their ship? I ask because the most accessible literature on this ...
6
votes
1answer
1k views

Could we use the moon for a slingshot effect?

The slingshot effect or gravity assist maneuver produces a boost on the speed of the object which attempts to approach a planet head-on at a speed V while the planet is moving directly toward us at a ...
2
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2answers
378 views

How did the Apollo Moon rocks get away from NASA and into the public?

I've been reading of stories such as one where a woman was detained after trying to sell a moon rock. This made me wonder how do Moon rocks get away from NASA and eventually find there way into the ...
0
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3answers
133 views

What is the soonest manned lunar landing date? [closed]

With the equipment development timelines we know about, what is the soonest date a manned lunar landing could take place?
0
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0answers
56 views

Why don't we have a base on the moon? [duplicate]

Isn't there still a lot we can find out about the moon? I think building a base there and getting payloads to land instead of dock would be a lot easier right? I think there would be a lot of people ...
7
votes
2answers
651 views

Which side of the Moon faces Earth, the heavy side or the lighter side?

It's well known that the near side of the Moon and the far side have different topographical features and that if the Moon had a core it might have been shifted to the near side that faces Earth due ...
7
votes
2answers
207 views

What are the “Moon L, B, C” angles shown in this solar eclipse simulation?

The NASA Goddard video Tracing the 2017 Solar Eclipse is a visualization of the calculated shape of the umbra during the upcoming August 2017 total solar eclipse, as it moves across North America. ...
11
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3answers
830 views

The Moon's shadow could not possibly look like this — could it?

The NASA Goddard video Tracing the 2017 Solar Eclipse is a visualization of the calculated shape of the umbra during the upcoming August 2017 total solar eclipse, as it moves across North America. ...
2
votes
1answer
120 views

Which perturbs LEO satellites more, the Moon's gravity directly, or the changes in Earth's gravity field due to the Moon?

Reading this tutorial answer on models of Earth's gravity field I was realized that I'd never thought of it as time dependent. According to it, the biggest short term changes in the shape of Earth's ...
7
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0answers
183 views

Why doesn't jupiter look bigger than our moon? [closed]

If Jupiter is 365 million miles away from earth. Our moon is about 238,900 miles away from earth. that means Jupiter is 1527.8 times farther away from the earth than the moon. Jupiter is 5285.2 times ...
4
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2answers
635 views

Will there be privacy on the Crew Dragon moon trip?

Will there be a privacy partition in the Crew Dragon during the one week trip around the moon?
1
vote
1answer
317 views

Different perspective of tidal force on Earth's ocean

From the book "The Science of Interstellar" by Kip Thorne. On Chapter 4 of the book, there is a diagram on the explanation of moon's gravity influence on Earth's ocean. Where diagram A is labeled as ...
17
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5answers
3k views

Do we still have all the blueprints to go to the Moon? [duplicate]

The answer to Do we still have all the equipment to go back to the moon? is an unambiguous "no". Most of the equipment went to museums or got scrapped. But do we still have all the know-how? Say, a ...
8
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2answers
2k views

Do we still have all the equipment to go back to the moon?

That is, does NASA still have all the training equipment, computers and so forth that would be required for a new moon program, or would all of that have to be rebuilt as well as building new rockets?
1
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1answer
243 views

Why doesn't a full/gibbous moon high in the sky ever seem to look orange? Shouldn't it? [closed]

The question Why does the Moon appear gray when passing between the Sun and the Earth? shows the famous "Moon photobombs Earth" image of the moon in front of the Earth taken from the EPIC camera on ...
8
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3answers
2k views

If there is actual ice on the moon, why hasn't it sublimated?

The Ars Technica article NASA seeks industry help with lunar landings, potentially sample return discusses the potential value of ice on the moon as a source for fuel in future space missions. Ice ...
3
votes
1answer
289 views

Could the Dragon 2 abort after trans-lunar injection?

Based on the data about the Dragon 2 that I can find, here are the relevant specs, from Wikipedia on Dragon 2 and on Draco engines, and their FAA filing for its pad abort test (page 8): Dry Mass: 6,...
3
votes
1answer
477 views

How does Exploration Mission 1 orbit differ from Apollo-era free-return? How far from Earth (and Moon) does it go?

I'm having trouble understanding the current orbit planned for NASA's Space Launch System's Exploration Mission 1. Is it possible to explain how the planned orbit works and what the maximum distance ...
0
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0answers
126 views

Why haven't we gone back to the moon? [duplicate]

In 40 years why has no country sent a manned mission to the Moon? I am aware the US retired the types of rockets that could get a man to the moon but why would they do that and why wouldn't they or ...
0
votes
1answer
657 views

What were the chances of failing the Apollo 11 mission? [duplicate]

What were the chances of the Apollo 11 mission failing? Consider the following scenarios: least one of the crewmembers dying, failing to land on the Moon, unable to return to Earth, the Soviets ...
2
votes
1answer
286 views

Are low, polar lunar orbits in general relatively stable?

The Phys.org article New NASA radar technique finds lost lunar spacecraft describes the use of radar to relocate two spacecraft that were in orbit around the moon but who's orbit had not been actively ...
21
votes
1answer
635 views

Does SpaceX have any significant additional legal hurdles for flying private citizens around the moon?

SpaceX recently announced they are planning to fly two private citizens around the moon. I'm sure a normal space flight has all sorts of legal complications, but does the addition of 2 private ...
56
votes
1answer
10k views

Which Apollo “mystery” was said to be finally solved by a better rendering engine?

I remember reading several years ago about a mystery or puzzle about a photograph from an Apollo moon landing mission that had to do with why someone's suit was as bright as it was in the photo. There ...
1
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1answer
649 views

What's the story behind this Apollo-era image?

This photo has been bothering me for quite a while, so I decided to look into it further. It is shown in Wikipedia's Opposition Surge article, which is a fascinating topic that I'd like to avoid here ...
4
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2answers
1k views

How much would it cost to build an international commercial moonbase?

The Earth's moon is one of the largest natural resources of our planet. My question: how much would it cost to build an internationally accessible commercial facility (moonbase) on the Moon?
5
votes
1answer
492 views

Moon orbit station-keeping delta-V budget

I am looking for examples of station-keeping delta-V budgets from lunar orbiters to verify the results of an orbital-perturbations programm that I wrote for my master thesis. Any indication on where ...
1
vote
1answer
220 views

Ephemeris for lunar body-centered body-fixed coordinates?

I'm going to try to do a modest simulation of the Moon's nutation as seen from the Earth (geocenter), similar to the technical one's I've shown in this question. I'll do it in Python and render it in ...