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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4
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3answers
2k views

How does a soft landing technically work without air on the moon?

I am curious to know about how rockets or an object lands on the moon when there isn't any air (atmosphere) and the gravity is low.
11
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1answer
938 views

What is the density of supercooled LOX at −206 °C, as SpaceX uses it

I want to calculate the size in cubic meters of Starship's propellant tanks. The only figures for LOX I can find are at −183 °C. 1141.7 kg/m³ at −183 °C. Could somebody please calculate it at −206 °C,...
3
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0answers
89 views

How much did it cost to rush the Apollo program? [closed]

We know how much the Apollo program cost: The United States spent \$28 billion to land men on the Moon between 1960 and 1973, or approximately \$288 billion when adjusted for inflation. Source ...
4
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1answer
104 views

Exactly how does one lope on the Moon?

This answer includes several quotes from apollo astronauts that have walked on the moon. They describe a form of bipedal locomotion they call loping. Question: Exactly how does one lope on the Moon? ...
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0answers
43 views

What would be the best course of orbital maneuvers for soft landing an asteroid near the lunar south pole? [duplicate]

Wouldn't it be nice for a colony near the south pole of our Moon to have a nickel-iron asteroid on the surface nearby ! Thousands near-Earth asteroids (NEAs) have been discovered with a diameter up to ...
4
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1answer
75 views

Question about orbital mechanics and trajectories for a space infrastructure project/climate adaption idea

I’m working on an alternate approach to the concept of using a solar shield to shade the earth from the Sun (to help with climate change adaptation). It would use streams of lunar soil from multiple ...
4
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2answers
180 views

What did walking on lunar regolith feel like?

Has the feel of walking on the regolith ever been described? I've heard a description of regolith being like talcum powder (don't remember where I heard that). Since the bulk of regolith has a ...
0
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1answer
99 views

Can pressure fed engines augment Starship's landing on the Moon?

Can a pressure fed engine be powerful enough to augment the landing of Starship on the Moon? How much thrust is needed to land SS if it’s brought to zero velocity at an altitude of 10 meters? A ...
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0answers
47 views

Will it be possible for the crewed Orion spacecraft to fly over the lunar south pole to land the VIPER rover there?

Artemis 2, the planned crewed mission of the Orion spacecraft, will be launched in the fourth quarter of 2022 and will then be the first crewed spacecraft to the Moon in 50 years ! VIPER is a lunar ...
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0answers
55 views

What is the calculation for the distance VIPER can travel without recharging its batteries?

VIPER, the lunar rover NASA has developed to search for water in the permanently shadowed regions near the south pole of our Moon, will be equipped with (rechargeable) batteries to be able to drive, ...
6
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0answers
142 views

Were flown lunar rover miniature license plates approved for the Apollo-15 flight?

A page in Space Flown Artifacts describes miniature lunar rover license plates that Dave Scott carried to the moon and back: These miniature license plates were manufactured by Boeing (makers of ...
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2answers
137 views

Could a framework of mirrors static in space above the Lunar south pole illuminate a moonbase there continuously?

When near the south pole of our Moon a permanent human community is established to search for and produce water in the permanently shadowed regions there, it would be nice to have some light from ...
2
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1answer
135 views

Why only 100 days for VIPER to look for water in the lunar south pole region?

VIPER is a lunar rover by NASA that will be tasked with prospecting for lunar resources, especially water ice, in permanently shadowed areas in the lunar south pole region. It is meant to support the ...
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0answers
74 views

How many times OR which times, have humans landed on the moon?

Apart from the Armstrong team expedition, which other time have humans made a moon landing?
91
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1answer
16k views

Who was the first human to sleep - perchance to dream - on the Moon?

Incidentally I don't mean "on the lunar surface, asleep laying on the surface of the moon" :) So (A) who (if anyone) was the first human to actually be asleep (that is to say, presumably inside the ...
3
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2answers
164 views

An eternal lunar day?

This comment, got posted and I did not understand it. for those interested, one rod per moonhour is about a quarter furlong per fortnight. If I googled correctly and jumped to the right ...
7
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2answers
397 views

How long is a day on the Moon?

I am moving to live on the Moon, I have a solar panel that only makes power when the sun shines on it. I will need to charge batteries to give me power during the lunar night. But I can't figure out ...
4
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3answers
211 views

Why are the poles of the Moon in Google Earth so different from other regions?

I am well aware of the fact that the poles of the Moon are different from the rest of the regions in many ways. But in Google Earth's Moon, the poles are so different from what we would see if we were ...
7
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3answers
676 views

Why is the Duration of Time spent in the Dayside greater than that of the Night side of the Moon for Chandrayaan-2 Orbiter?

The following information is from ISRO's webpage on "Detection of Argon-40 in the lunar exosphere" (Textual information relevant to my question is in bold face): The Chandra’s Atmospheric ...
2
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2answers
200 views

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

Source NASA TechCrunch's NASA’s VIPER lunar rover will hunt water on the Moon in 2022 says: VIPER is a limited-time mission; operating at the poles means there’s no sunlight to harvest with solar ...
2
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2answers
59 views

What would be the temperature range measured 2 meters above the Moon's surface? @10m? @50m? [duplicate]

Were there any temperature measurements experiments done on the Moon where the temperature was measured ABOVE the surface for any period of time?
4
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1answer
108 views

Single Engine versus Multiple Engines for Moon Landing

Does it really make any huge difference in the amount of lunar dust disturbed or raised during a Moon landing while using a single-engine compared to using multiple engines? I do not think there ...
56
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1answer
5k views

Apollo image lighting

How does the lighting in this photo work? It is strange.
3
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2answers
123 views

Would spacecraft rot or degrade over time faster on Mars, on The Moon, or in space?

One question I really wanna ask; do spaceship's rot? If they do degrade, does being on Mars, on The Moon, or in space increase the rotting speed of the spaceship? If so, in which environment would ...
12
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3answers
3k views

Differences between vehicles used on the Moon and the ones used on Mars

What are the differences in design considerations between Moon rovers and Mars rovers?
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1answer
208 views

What will happen to gas released from the Moon's Surface?

When humans return to the surface of the Moon, there could be many circumstances under which gas is released out, from the pressurized components. Some of the cases are as follows: Gas released from ...
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0answers
39 views

Why weren't there any manned moon landings in the recent decades? [duplicate]

The last time a human landed on the moon was back in the 1970s. Why haven't there been any manned moon missions since? I understand that the US deemed them less important after winning the race to the ...
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2answers
6k 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
84 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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2answers
60 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
111 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
211 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
330 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,...
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4answers
12k 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
74 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 ...
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2answers
298 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
470 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
88 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
89 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
267 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
474 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
81 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
49 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 ...
4
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1answer
91 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
45 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
106 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 ...
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1answer
570 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, ...)...