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Questions tagged [lunar-landing]

Questions on the subject of missions to the Lunar surface - past, present, and future

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When Buzz Aldrin has been asked, at an airport and on a talk show, about the moon landing, why is his answer “It never happened.” It was animation [closed]

Twice seeing video of a reputable Buzz Aldrin replying to questions about the moon landing with “It never happened”, adding it was animation and there were “no cameras on the moon” was believable. ...
Seeker382's user avatar
1 vote
0 answers
123 views

Any ideas?: Calculating wet-mass and burn altitude for a Mars landing, using a Python simulation

In this post, I will explain the problem, provide some detailed context, and finally explain what I am searching for (what my question is basically). First of all, this should be quite a fun but ...
AvanD's user avatar
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33 votes
2 answers
5k views

Could Apollo have survived the lander toppling over?

Did the Apollo mission have a contingency plan for the lander tipping over? For instance, would it have been possible for the two astronauts to somehow right it? EDIT This question is closely related ...
Steve Bennett's user avatar
1 vote
0 answers
101 views

What scientific constraints will the Nova C IM-1 mission have?

The IM-1 mission flipped over during its landing attempt. Luckily there still is a decent connection with the spacecraft. From what I have seen, some things that they planned such as using an eagleCAM ...
The Rocket fan's user avatar
3 votes
2 answers
130 views

Intuitive machines IM-1 ("Odysseus") lunar lander: commercial sponsorship

Photographs including https://upload.wikimedia.org/wikipedia/commons/2/24/Intuitive_Machines%E2%80%99_Nova-C_lunar_lander_%28IM_00309%29_%28cropped%29.jpg appear to show this bearing a Sun ...
Mark Morgan Lloyd's user avatar
3 votes
0 answers
67 views

Righting JAXA's SLIM Lunar lander using RCS

The SLIM lander was supposed to roll onto the side as part of the landing process but ended flamey end up. Which has impacted the ability of the vehicle to collect solar power, and probably other ...
GremlinWranger's user avatar
8 votes
1 answer
215 views

Chandrayaan landing ellipse size and rationale

From what I hear about the Chandrayaan-2 failure analysis, the spacecraft overshot its landing ellipse and, while struggling to backtrack, crashed. I have been wondering why they had specified a ...
John McCarthy's user avatar
3 votes
0 answers
205 views

Was TTCA used during the Apollo 11 landing phase?

Neil selected P66, so he used the ROD switch to adjust the altitude rate (he could not use the TTCA throttle). My question is whether he used the X,Y axis translation feature of TTCA or not. The ...
r2limited's user avatar
3 votes
3 answers
4k views

Going over the Apollo fuel numbers and I have many questions

I was reading through Apollo by the numbers and I noticed the LM descent to the moons surface consumed 17,414kg of fuel out of a total of 18,184kg leaving only 770kg of fuel. But then in the very next ...
Brain's user avatar
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25 votes
2 answers
6k views

Did Apollo astronauts spend any time on the lunar surface during lunar night?

Are there any images from the surface of the moon during lunar night? Preferably taken by Apollo astronauts, but otherwise by rovers etc showing "earthshine" on the lunar surface? I found ...
tomh's user avatar
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1 vote
1 answer
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Moon landing with ion thrusters

In Kerbal space program I built a mini cubesat (similar to NASA’s lunar flashlight probe) and managed to land on the moon only using ion thrusters. However, it was risky because it took a few tries. ...
The Rocket fan's user avatar
3 votes
1 answer
83 views

HAKUTO-R Mission length after landing?

I was unable to find sources about what will happen to the current HAKUTO-R lunar lander after it lands in ± 4.5 months. There are two possibilities coming to mind: The lander won't survive the lunar ...
RAD6000's user avatar
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7 votes
2 answers
3k views

Whats are the objectives of Artemis I?

Is there any major reason or research that can only can be done by humans or is it just so we can say "we did it again"?
Bored duck's user avatar
7 votes
1 answer
432 views

What is this beige, pill shaped object on the back of the Apollo Lunar Module?

Is it an antenna, or something else? Image from https://upload.wikimedia.org/wikipedia/commons/0/04/Apollo_11_Lunar_Lander_-_5927_NASA.jpg
BDA's user avatar
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3 votes
2 answers
235 views

Could dust kicked up from the Apollo landings reach Earth intact?

According to various sources (1,2, and 3) lunar landings kick up a lot of dust at very high speeds. Is it possible that some dust was able to get fast enough to escape the moon, fall towards Earth, ...
Starship's user avatar
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7 votes
1 answer
246 views

Moon Suit to be used for the Artemis III mission?

The Moon landing mission Artemis III is scheduled for launch in 2025. It will be the first Lunar crewed mission after Apollo. What is the development state of the moon suit to be used for moonwalks ...
Uwe's user avatar
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9 votes
2 answers
538 views

Proposed Christmas Island launch site, 1952 von Braun Luna Study

In a 1952 study, Wernher von Braun devised a "manned lunar lander" as illustrated below. The study looked at three lunar landers taking a crew of 50 to Sinus Roris (Bay of Dew) in 1977. ...
Fred's user avatar
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14 votes
3 answers
2k views

How did the lunar module avoid problems with flying regolith when taking off?

In November 2020, a SpaceX rocket suffered damage due to a problem with the launchpad, and future missions to the Moon and Mars could suffer similar problems since there won't be a launchpad at all. ...
usernumber's user avatar
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20 votes
2 answers
2k views

How Did One Stand in The LEM Before Descent? [duplicate]

This is really simple, but i've never seen it discussed. One piloted the Apollo LEM standing up, without many restraints. But before the LEM ignited the descent engine, it was practically in free fall....
Selene Routley's user avatar
6 votes
1 answer
481 views

Would the Lunniy Korabl be able to dock with the Oryol spacecraft?

As a successor to the Soyuz program, Russia is currently planning the Oryol/Federatsiya, at first for LEO flights and eventually for lunar ones. Russia wants to build a lunar space station (similar to ...
user avatar
1 vote
0 answers
178 views

How big are the risks of Starship flipping during or after landing on the Moon?

Now that NASA has announced the selection of SpaceX to manufacture the Moon landing vehicle(s) for the Artemis program, I can't but notice how tall Starship is when compared to other concepts. Chances ...
ZuOverture's user avatar
2 votes
2 answers
291 views

Falcon 9 vs Apollo Landing: Key Differences?

So I'm struggling to model a Falcon 9 vertical landing. And because Falcon 9 info is scarce, I'm looking for more public info sources---like the apollo missions. The Apollos did basically vertical ...
user avatar
3 votes
2 answers
678 views

What are SpaceX plans for Starship with respect to Moon landing and then takeoff?

Starship uses Raptor engines which in turn uses liquid methane as fuel. The idea for using methane as fuel being - methane can be produced on Mars from CO2 and H2O. And using the onsite produced ...
samshers's user avatar
  • 131
2 votes
0 answers
87 views

How likely is it for Chang'e 5 to wake up after lunar night?

I have been wondering how likely it would be for the Chang'e 5 Probe to wake up. I mean the surveyors did this a few times, but were all relatively simpler in design. Also what gets damaged in the ...
RAD6000's user avatar
  • 1,178
11 votes
1 answer
2k views

What is the danger of creating micrometeorite clouds orbiting the Moon by constantly landing spacecrafts on its surface?

It is a well-known fact that when meteorite hits surface of the Moon, a part of debris can end up on Earth because the escape velocity for Moon is low - 2.38km/s. A similar effect can be achieved by ...
WOW 6EQUJ5's user avatar
  • 2,321
3 votes
2 answers
252 views

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 ...
SE - stop firing the good guys's user avatar
8 votes
2 answers
1k views

Is there really microfilm on the Moon?

A comment below this answer to Disc mounted on lunar rover? suggests that ...a number of documented microfilms that were on the Apollo missions. meaning I presume that bits of microfilm were ...
uhoh's user avatar
  • 149k
6 votes
1 answer
623 views

What is the inclination limit for Artemis landings?

Inspired by Did any of the Apollo lunar modules land significantly off level? I'd like to know if there is an inclination limit for the Artemis Human Landing System?
Martin Schröder's user avatar
8 votes
1 answer
916 views

What was the nature of the communication problems during Apollo 11's Eagle's descent? How were other antennas selected?

In the video of Los Angeles station KTLA's Frank Buckley interviewing astronaut & Apollo 11 CAPCOM Charlie Duke a communication problem and antenna selection is described: BUCKLEY: Many of us who ...
uhoh's user avatar
  • 149k
19 votes
1 answer
2k views

Procedure to deal with the death of Apollo astronaut during a lunar mission

During Apollo lunar missions, had the command module pilot have died while the other two astronauts were on the Moon, or had only one of the two lunar walkers died, did NASA have a procedure for such ...
Fred's user avatar
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21 votes
2 answers
5k views

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 ...
learner's user avatar
  • 665
2 votes
0 answers
58 views

Did NASA develop any crewed moon landing programs between Apollo and Constellation?

I just assumed that NASA has always been developing some plan to get humans back on the moon since Apollo was cancelled. But while attempting to verify this, I found that this doesn't seem to be the ...
Alex Altair's user avatar
8 votes
2 answers
627 views

apollo 11 moon landing longitude latitude from PDI to Touchdown

I'm reconstructing the entire apollo 11 mission trajectory. I'm now at the moon landing. Does someone know specific documents specifying longitudes and latitude at the different interfaces starting ...
venom's user avatar
  • 333
23 votes
3 answers
4k views

What equipment was taken from Earth to the surface of the Moon and back?

During the Apollo missions, basically everything was left behind as soon as it was no longer needed. Of the approximately 45-48 tons that the CSM+LM weighed at launch, only 10% made it back to Earth. ...
Ludo's user avatar
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2 votes
1 answer
276 views

What spacesuits did the Apollo astronauts wear on Earth in their training for the Moon?

Even on the Moon the Apollo spacesuits were so heavy and bulky that the Apollo astronauts couldn't move quite well in them, except in the Apollo 15-17 missions where they were improved. However on ...
user avatar
30 votes
4 answers
4k views

Could the lunar module have moved to a different spot?

Suppose Neil Armstrong had landed with plenty of spare fuel, only to decide it really wasn't a good spot after all. Could he have lifted back off and landed again, perhaps a couple of hundred feet ...
Mark Foskey's user avatar
  • 11.4k
1 vote
0 answers
40 views

Apollo 11 Moon orbital elements [duplicate]

I'm simulating several pieces of the Apollo 11 mission. I'm now at the point of performing lunar landing sequence, and I'm looking for data. I found this report, but it only has partial data, while ...
venom's user avatar
  • 333
4 votes
2 answers
435 views

Could a nuclear thermal rocket take off from the surface of the Moon?

Could a nuclear thermal rocket take off from the surface of the Moon? The application is a shuttle from LEO to the Lunar surface. Fairly recent NASA plans include an NTR LEO to LLO shuttle, but use ...
DrBunny's user avatar
  • 179
5 votes
1 answer
577 views

Does the Artemis III mission have a backup plan if the astronauts are unable to ascend from the Moon?

For the unlikely scenario where the Artemis III astronauts having landed on the Moon press the ascent button and nothing happens, will NASA have a backup or rescue contingency plan? If so, what ...
Anton Hengst's user avatar
  • 10.9k
7 votes
2 answers
431 views

Did the Apollo LM's cockpit altitude displays account for the pointing angle of the radar altimeter?

The Apollo LM had a radar altimeter which was particularly critical in the final stages of landing. It could be set to two different pitch angles, either aimed backwards by 24º to be used during the ...
Russell Borogove's user avatar
16 votes
2 answers
2k views

Apollo altitude vs rate-of-descent schedule

In the final phase of the Apollo landings, the commander would go into "P66 attitude hold" mode, where the computer maintained a steady rate of descent while allowing the commander to change ...
Russell Borogove's user avatar
2 votes
1 answer
208 views

Controlling suicide burn landing location in a python simulation?

I recently asked a question in stackoverflow about Simulation of suicide burn in openai-gym's LunarLander. Sadly most of my assumptions about suicide burn implementaion were wrong but the answer given ...
Eka's user avatar
  • 121
9 votes
1 answer
288 views

Source for Apollo 11 descent time series data?

I'd like to find the state of the Apollo LM at various times during the powered descent phase: its position relative to the Moon's surface and/or the final touchdown point; its attitude in space, and ...
Russell Borogove's user avatar
3 votes
0 answers
547 views

Model multi-stage lunar transfer on GMAT?

I am new to GMAT, and I am wondering if it is possible to simulate a multi-stage lunar transfer on GMAT? The mission sequence I am hoping to model is a low earth orbit, followed by a trans-lunar ...
Lisa's user avatar
  • 135
1 vote
1 answer
263 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 ...
SpaceInMyHead's user avatar
0 votes
1 answer
156 views

Could two space ships, traveling at different times, pass through the same space?

This question flows from the recent question Would rocket engine exhaust create pockets of gas in space which could hinder further space exploration? it talks about daily Earth — Moon trips If we ...
James Jenkins's user avatar
5 votes
1 answer
242 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 ...
Vishnu's user avatar
  • 3,296
50 votes
4 answers
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 ...
George W.'s user avatar
  • 501
8 votes
3 answers
379 views

Were Soviet plans for a manned lunar landing always lunar orbit rendezvous?

There are three basically three ways to get a person to the moon and back: Direct. One spacecraft launches from Earth, lands on the moon, takes off again, and lands back on Earth. It may shed parts ...
DrSheldon's user avatar
  • 48k
9 votes
2 answers
2k views

Why would thermal imaging be used to locate the Chandrayaan-2 lander?

Tweets and news suggest that Chandrayaan-2 lander may have been located, using thermal imaging by the Chandrayaan-2 orbiter. Space.com: India Just Found Its Lost Vikram Lander on the Moon, Still No ...
uhoh's user avatar
  • 149k