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Results tagged with the-moon
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user 44272
Questions about Earth's Moon. Also for questions about spacecraft, manned missions, potential missions, etc. related to Earth's Moon.
3
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0
answers
205
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Lunar power transmission using bare conductors laid on the regolith?
Electrical power transmission on the lunar surface will likely become necessary to join solar farms and lunar facilities, especially if water hydrolysis is used to make hydolox propellant.
Constructi …
- 27.8k
1
vote
How is it proposed to extract oxygen from lunar regolith?
Pyrolysis (breakdown by heating) was shown to release oxygen from regolith returned by Apollo missions. See Pyrolysis of regolith can produce hydrogen and oxygen. Is this a viable alternative to water …
- 27.8k
4
votes
0
answers
89
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Does the low conductivity of regolith limit lunar surface radio communication?
The maximum distance of radio communication depends on the carrier wave frequency. For shortwave, carrier wave range exceeds line-of-sight by utilizing skywave (ionosphere) reflection. Medium carrier …
- 27.8k
5
votes
1
answer
521
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What is the optimum lunar latitude for a solar farm and hydrolysis plant?
What is the optimum lunar latitude for a solar farm and hydrolysis plant?
Water is hypothesized to be present at the lunar poles. There have been proposals to hydrolyzed it into propellant. Large amou …
- 27.8k
1
vote
Mass of a circumlunar power transmission line?
The conductor mass depends on design criteria. The following assumptions were plugged into http://wiresizecalculator.net
-Transmission line is 5000km long
-Single phase AC (two wires)
-Aluminum conduc …
- 13.3k
11
votes
What is this surface feature near Shackleton crater classified as?
The area is named the “Shackleton connecting ridge” and the “Connecting Ridge Extension” according to https://svs.gsfc.nasa.gov/5013 video https://svs.gsfc.nasa.gov/vis/a000000/a005000/a005013/group …
- 27.8k
3
votes
1
answer
186
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Why is the proposed lunar radio-telescope parabolic, rather than spherical like Arecibo?
The Lunar Crater Radio Telescope LRTC is a proposed fixed dish radio antenna to be built in a far-side lunar crater.
https://en.wikipedia.org/wiki/Lunar_Crater_Radio_Telescope#/media/File:Niac2020_b …
- 27.8k
3
votes
Why is the proposed lunar radio-telescope parabolic, rather than spherical like Arecibo?
According to Lunar Crater Radio Telescope (LCRT) on the Far-Side of the Moon NASA Innovative Advanced Concepts (NIAC) Phase 1 Report,
We propose to deploy a 1km-diameter wire-mesh ... to form a
spher …
- 189k
5
votes
Permanent living on Maglev train on the Moon as a colony
Using linear acceleration to produce “gravity” is impractical. The duration of normal “gravity” would be brief before linear velocity exceeded the design limits of the train.
However, a train on a can …
- 27.8k
6
votes
Accepted
Is TIG or laser welding feasable for building aluminum habitats either on the Moon or in orbit?
Answer: I think wire-feed MIG (metal inert gas) welding would be the better choice for structural aluminum space habitats. https://ntrs.nasa.gov/citations/19940000578
TIG (tungsten inert gas) has adva …
- 27.8k
1
vote
How much is the estimated amount of ilmenite present on Lunar surface?
Ilmenite occurs in abundances as high as 25 wt% in some lunar basalts.
Maximum yields calculated as mass of oxygen per mass of rock thus
range from 2-2.5 wt%.
https://curator.jsc.nasa.gov/lunar/lnew …
- 27.8k
2
votes
How do we know the Apollo Moon landings are real?
Answer: We know the moon landings are real because the overwhelming mass of evidence says they are real. I don't believe moon landings are real. I believe the evidence for moon landings is real.
The M …
- 27.8k
4
votes
Alternative small mass payload transportation from the moon to L5 besides rail gun and mass ...
Answer: Whip launch
A bull whip accelerates the tip of the whip from about 1m/sec to supersonic (>343m/sec) in less than 5 meters by momentum transfer from the handle end to the tip end. The same mech …
- 27.8k
4
votes
Alternative small mass payload transportation from the moon to L5 besides rail gun and mass ...
Quenchgun
This is more of an extended comment than an answer since it deals with a type of coilgun design, which is a mass driver and so excluded in the question. However, the quenchgun's much lighter …
- 27.8k
3
votes
Methane internal combustion engines for rovers on Mars and Moon. Feasibility?
SpaceX has already developed one CH4/O2 ICE: The Raptor. We don’t usually think of liquid fueled rockets as ICEs, but they are: compression, ignition, expansion and all that. It is very difficult to r …
- 27.8k