Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [the-moon]

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

2
votes
2answers
97 views

How close to the moon would a flyby trip likely attempt?

For a flyby of the moon, like the SpaceX #dearMoon flight announced September 17, 2018, how close would they likely attempt to pass? Is there an average or optimal trajectory for a lunar flyby used ...
4
votes
3answers
1k views

Will SpaceX's moon mission carry any engineers to fix the craft or will the artists be trained for these operations?

In the live stream, Elon Musk mentioned that a dozen would be the ideal size for a mission. Could have easily been an off the cuff range, but would allow for some engineers if something goes wrong. ...
5
votes
2answers
682 views

Is SpaceX lunar mission only a flyby mission, or it is going to land on Moon too?

Is SpaceX lunar mission only a flyby mission, or it is going to land on Moon too?
1
vote
1answer
66 views

Have there been long-term observations of the effects of lunar exposure to equipment?

Two years after Surveyor 3 landed on the moon, Apollo 12 landed at the same site. The astronauts made observations of Surveyor, took photographs, and brought back parts for analysis on Earth. This ...
3
votes
1answer
79 views

When Wikipedia gives the semimajor axis of the Moon's orbit, which distance does this represent?

The masses of the Earth and Moon are in a ratio of about 81:1, so they can be thought of as orbiting around their common barycenter which is inside the Earth, but about 2/3 of the way to the surface. ...
10
votes
2answers
1k views

How to collect gases on Moon and in space?

On Earth if you need to collect gases you can use passive hood exhaust under a fusion (convection), or just under hot liquid, or use vacuum pumps for catch gases together with air. In the space or on ...
10
votes
2answers
2k views

Is lunar regolith available for purchase?

Is moon dust (lunar regolith) available for purchase legally? NASA has about 382 kg moon regolith fro Apollo's missions. Is it possible to by a couple grams of it in NASA?
30
votes
5answers
6k views

How could an object barely exceeding escape velocity from the Moon eventually reach the Earth?

Since NASA is once again targetting low-cost missions to the Moon, I was thinking about low-cost methods of getting stuff from the Moon back to Earth. Although it seems reasonable to assume that ...
4
votes
1answer
172 views

Which existing or near future rockets will be able to get to the Moon?

Which existing or planned in nearest future rockets will be able to get to the Moon with a payload of about 1000 kg? For example with the Astrobotic Lunar Lander: https://spacenews.com/astrobotic-...
3
votes
0answers
80 views

Revisiting moon landing sites?

Are there any current plans to return to the moon, preferably close to an existing landing site? After all, it seems like a sound scientific project given that there's talk of human colonization of ...
5
votes
1answer
82 views

Where is the “almost certain” water in these spectra from Chandrayaan 1's Moon Mineralogy Mapper?

The New York Times article Ice on the Surface of the Moon? Almost Certainly, New Research Shows talks about the recent paper published in PNAS Direct evidence of surface exposed water ice in the lunar ...
2
votes
3answers
153 views

What is the daytime ambient temperature on the moon in shade?

I know that the daytime surface temperature can exceed 270°F (130°C) but if you measured the temperature 5 feet (1.5 metre) off the surface in shade what would the reading be? To further specify the ...
31
votes
2answers
6k views

Why didn’t the Spacecraft used for the Apollo 11 mission melt in the Earth’s Atmosphere?

My brother has recently been converted to a Flat Earther and is convinced that something that proves his theory is the moon landings being faked by NASA. I have managed to counter argue the majority ...
4
votes
0answers
70 views

How will the Lunar Gateway go to L2 and L1?

In a talk to the press which can be heard in the YouTube video NASA Administrator Jim Bridenstine Explains the Lunar Gateway, NASA director Jim Bridenstine says after about ...
41
votes
2answers
11k views

Is pinging the Moon with a laser as shown on “The Big Bang Theory” possible?

In an episode of season 3 of The Big Bang Theory, the cast sends a laser pulse to the Moon. This seems to be a real thing: What Neil & Buzz left on the Moon (2004). My questions are: Could ...
12
votes
3answers
1k views

How do space suits offer heat protection i.e. during the lunar day?

I didn't know that during lunar day temperature is up to +100°C. This would mean US astronauts were rather to protect against heat than cold? How was this solved (normally, space suits protect from ...
3
votes
1answer
188 views

Where exactly do these supposed images of structures on the Moon and other bodies come from? [closed]

I'm sure you have seen these kind of images before, and the gullible people who think they are real, some just look stupid and obviously fake, others look kind of convincing. Even though they ...
2
votes
1answer
85 views

Most attractive resource on the Moon

What is the most attractive resource available to be extracted on the Moon? By the most attractive I mean the most useful considering the location in which it's extracted and including all the ...
3
votes
0answers
40 views

What are the chances that the ISS transits the moon as seen from your house (or headquarters)?

In this answer I tried to do a simple probablistic estimate on the distribution of the ISS's ground track passes over Earth's equator. Recently there is a photo of the ISS passing over SpaceX ...
2
votes
2answers
86 views

Could the Lunar Lagrange Points work for space telescopes?

Every orbit in space has its pros and cons. Low Earth Orbit has accessibility but frequent eclipses whereas a Solar Lagrange Point is clear and stable but distant. In the case of the Lunar Lagrange ...
13
votes
1answer
2k views

How easy is it to take off from the Moon?

I do wonder how easy it was for the astronauts to take off from the moon, in their landing craft. I realise that there's no atmosphere there, and that gravity is about one sixth of that of the Earth's ...
4
votes
0answers
87 views

What physiological effects did the Apollo astronauts experience due to the lower lunar gravity?

When humans are exposed to weightlessness they often experience space adaptation syndrome (similar to motion sickness). Also fluid redistribution to the upper body is nearly immediate causing bulging ...
9
votes
1answer
143 views

How does the ISS Transit Finder website get the position of the ISS so accurately?

The recent Petapixel article How to Shoot the ISS Flying Across the Face of the Moon gives a lot of detailed, helpful advice for photographing transits of the ISS across the disk of the Moon. For ...
3
votes
1answer
430 views

What will China's new “space station” in Argentinian Patagonia be used for?

The New York Times (fairly strongly worded) article From a Space Station in Argentina, China Expands Its Reach in Latin America describes a "space station" or base equipped with (among other things) a ...
10
votes
1answer
963 views

How much total lunar mass remains viable for analysis here on Earth?

I know that samples of lunar regolith were taken on many missions to and from the moon, but I also know that these rocks aren't common and are being used for analysis purposes. According to this NASA ...
0
votes
0answers
54 views

Could a revised Space Shuttle be sent to the moon with a lander as cargo? [duplicate]

Why couldn't a modernized and revised Space Shuttle with attached fuel tanks be used to go to the moon with a moon lander in it's cargo bay?
3
votes
1answer
69 views

Would we be able to see a Space craft transit in Lunar orbit?

If a Apollo type Moon mission happened today would we be able to see it transit in Lunar orbit? I know we can't see the Landing sites of the Apollo but could we see the Command Module and its shadow ...
2
votes
1answer
126 views

Expected differences between concrete prepared on the ISS and matched samples prepared on Earth?

The Spaceflight Now article Cygnus arrives at station with CubeSats, quantum physics experiment describes experiments that will be done on the ISS mixing small samples of either cement or concrete (I ...
43
votes
3answers
12k views

Why is an airbag landing on the moon not viable?

In this related question, it was explained that the differences in design between a Mars rover and moon rover were too substantial to substitute one for another. One of the points made was that the ...
9
votes
2answers
1k views

Differences in the design of a commercial Moon rover and a commercial Mars rover?

News in May, 2018: Spaceflight Now NASA cancels lunar rover, shifts focus to commercial moon landers Washington Post Stunning scientists, NASA’s only moon rover just got canceled Space.com NASA Kills ...
6
votes
1answer
412 views

Where can I buy lunar regolith simulant?

I am a high school student living in Canada that needs lunar regolith for a science experiment? Anyone know where to buy simulant of it?
1
vote
0answers
76 views

How would we make concrete on the Moon?

Bringing building materials to the moon would be costly. It would be better to just create materials on the Moon.
1
vote
0answers
39 views

How bright would electrostatically suspended dust above the lunar surface be? Has it ever been measured?

@TomSpilker's answer mentions the potential effect of dust from the lunar regolith being slightly electrostatically levitated by the charge on the lunar surface induced by the solar wind on telescopic ...
1
vote
1answer
84 views

Is there any Scientific Benefit to the Lower Albedo levels on the Darkside of the Moon?

I was reading the answers to this question: What did the sky actually look like from the Moon? And it got me thinking... What, if any, astronomy tasks could be performed better on the lunar far side ...
32
votes
3answers
1k views

How do we know the Apollo Moon landings are real?

Since about 1976, conspiracy theories denying the Moon landing and claiming it was all faked have cropped up. As a website devoted to answering questions about space exploration, we receive questions ...
17
votes
1answer
2k views

What is the purpose of the satellite that China is putting in lunar orbit?

I was just reading an article about the satellite that China is putting in Lunar orbit as phase one for their exploration of the far side of the Moon. Is this satellite just to be used as a signal ...
3
votes
1answer
61 views

Shape and dimensions of the Moon's reference surface for selenographic latitude/longitude?

For Earth, the reference surface for "GPS" latitude, longitude, and altitude is the WGS84 ellipsoid, with equatorial and polar radii $a, b$ of 6378.1370 and 6356.7523 kilometers, respectively. ...
19
votes
2answers
860 views

How exactly did the floor of an Apollo LM look like after EVA(s)? Seeking photo!

Almost five years ago I posted a question entitled "How was dust-mitigation addressed during the Apollo program?". While the question was answered rather comprehensively, it left me even more curious. ...
4
votes
0answers
147 views

Pool on the Moon?

Hypothetical scenario: There is a dome on the moon containing an Olympic-size swimming pool. Our intrepid hero is receiving a scuba diving lesson at the bottom of the pool (3m) when a hull breach ...
3
votes
0answers
125 views

(What happened to the) Plans to visit and/or document sites of previous lunar landings? Are any active now?

There are a lot of (now historic) landing sites on the moon. You can see a great review of them in this answer to the question How many extraterrestrial bodies have hosted a “lander” which returned ...
3
votes
2answers
68 views

Spacecraft Horizon Sensors for Lunar orbit

Recall that "traditional" horizon sensors for Earth missions utilize the IR wavelength regime since this can reveal a good contrast between the cold space and the warm Earth-limb edge. If we were to ...
5
votes
0answers
122 views

Low energy cements for Mars and Callisto. Waterless cement for the Moon. Any good candidates?

In the non-polar regions of the Moon and Mercury there is a shortage of volatiles, including hydrogen and nitrogen, so they might be regaded as too valuable to be "wasted" to prepare concrete. ...
3
votes
1answer
86 views

Could a radio telescope orbit Earth-Moon L2 so that it is in the Moon's radio shadow?

Chang'e 4, a Lunar orbiter and lander on the far side of the Moon, will put a relay satellite in a halo orbit around EML2 that also will do some low frequency radio astronomy. Since the Chang'e 4 ...
3
votes
0answers
103 views

Were the Apollo lunar ALSEP transmitter signals ever analyzed or used after the experiments were shut down?

This answer to the question Why were the “perfectly functioning” seismometers placed by Apollo 12, 14, 15 and 16 astronauts all shut off in 1977? links to a NASA News Release No: 77-47 dated September ...
4
votes
1answer
495 views

Why were the “perfectly functioning” seismometers placed by Apollo 12, 14, 15 and 16 astronauts all shut off in 1977?

The Wikipedia subsection Moonquake says: Information about moonquakes comes from seismometers placed on the Moon by Apollo astronauts from 1969 through 1972. The instruments placed by the Apollo 12,...
4
votes
2answers
196 views

What size payloads could we feasibly launch from the moon with a mass driver?

I've been wondering how large a payload could be launched & if it's viable to launch those payloads directly to the earth for splashdown & collection. Obviously the payload would need to be ...
2
votes
0answers
33 views

Which materials make up a Commercial Satellite?

I'm writing a story based on the premise that an already-existing moon base is used to mine, construct, and launch a bunch of commercial satellites to GTO (the lunar surface is way "closer" to GTO ...
5
votes
1answer
349 views

Stripe of high def imagery on Google Moon

When messing around with Google Earth's Moon and Mars features I noticed that the lunar imagery used is mostly homogeneous except for a large stripe across its' surface. See Image: This "stripe" also ...
1
vote
1answer
59 views

How do I determine date in history when the moons sidereal month was 27.416 days long? [closed]

I understand that the moon's orbit is gradually increasing because it's moving away from Earth at a rate of about 3.8 cm per year. I also understand that there isn't enough long term data to assume ...
2
votes
1answer
185 views

What is the case for human presence on the Moon?

The Moon landings in the 1960s happened largely, if not entirely, because of Kennedy's mandate. Although Apollo started before his famous speech, it was an expensive endeavour which could have been ...