Questions tagged [lunar-landing]

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

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3
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2answers
212 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 ...
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941 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 ...
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1answer
436 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?
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1answer
104 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 ...
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1answer
816 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 ...
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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 ...
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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 ...
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425 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 ...
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3answers
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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. ...
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1answer
88 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 ...
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3answers
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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 ...
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0answers
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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 ...
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2answers
332 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 ...
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1answer
212 views

Does the Artemis III mission have a backup plan if the astronauts are unable to ascent 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 ...
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219 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 ...
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2answers
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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 ...
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1answer
117 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 ...
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53 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 ...
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0answers
151 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 ...
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1answer
132 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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1answer
103 views

Could 2 space ships traveling at different time 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 ...
4
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1answer
131 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 ...
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4answers
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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 ...
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3answers
280 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 ...
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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 ...
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What does Cees Bassa's Doppler plot of Chandrayaan 2 show?

Cees Bassa's tweet shows a plot of received frequency versus time, with the Doppler shift of the Moon's center of mass subtracted. For a lunar orbit the resulting plot would show sinusoidal-like ...
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2answers
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Are there photos of the Apollo LM showing disturbed lunar soil resulting from descent engine exhaust?

Are there any photos of the Apollo LM descent engine bell and the lunar soil beneath it disturbed by the engine exhaust?
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502 views

Why do all recent proposed lunar landers have payloads on top?

Every recently-proposed vacuum lander I've seen has its payload as far off the ground as possible. This necessitates cranes, ladders, and elevators to get things down. (Starship may be a partial ...
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1answer
3k views

How was the cosmonaut of the Soviet moon mission supposed to get back in the return vehicle?

In the Soviet Moon mission, for which the ill fated N-1 launcher was built, we know that the cosmonaut responsible for landing on the moon was to transfer from the equivalent of the command module to ...
5
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1answer
288 views

How many different kinds of insulation film are wrapped around the Apollo Lunar Module?

In the image shown in the question Why is the Apollo LM landing gear covered with so much thermal isolation? (also shown below) it appears that the color of the film around the bottoms of the lander's ...
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2answers
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How did astronauts using rovers tell direction without compasses on the Moon? [duplicate]

I read that the astronauts who used Lunar rovers used heading indicators, which typically use compasses, for direction. How, on the Moon, did their equipment tell the direction of travel, presuming a ...
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2answers
507 views

Why was the LRV's speed gauge displaying metric units?

In the question Why did NASA use U.S customary units? it was basically stated in the answers that even when metric units were used "internally" (e.g. the AGC), the units presented to the astronauts ...
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1answer
198 views

Why did NASA sent people to the Moon more than once? [duplicate]

Often, especially now with the 50th anniversary of the Apollo 11 mission, the question is asked: Why did we stop sending people to the moon. The answer is usually: because the USA had proved they ...
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Why were contact sensors put on three of the Lunar Module's four legs? Did they ever bend and stick out sideways?

In the video Brian Eno on Apollo starting at 08:37 there is Apollo-era movie footage of a lunar module taken from the command module as it prepares for descent ...
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1answer
548 views

How “hard” did Apollo 12 turn left just before it landed?

This answer to How much were the LMs maneuvered to their landing points? includes Figure 34 from Floyd Bennett's 1972 Apollo Experience Report - Mission Planning for Lunar Descent and Ascent; NASA TN ...
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3answers
548 views

How much were the LMs maneuvered to their landing points?

The story of the Apollo 11 landing includes Armstrong having to fly the LM beyond a boulder field at the automatically targeted site. Was this essentially continuing along the same track the LM had ...
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2answers
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How were the LM astronauts supported during the moon landing and ascent? What were the max G's on them during these phases?

I understand that the LM astronauts descent trajectory had them flying feet first in a standing position during the descent to the lunar surface and again on ascent. But it seems there must have been ...
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2answers
116 views

How does the economy of a direct launch (to the Moon) compare with two launches docking in orbit?

How much more efficient would it be to use a launcher big enough to go directly to the surface of the Moon like Apollo did, compared with using two launches with a lesser rocket, say one with the ...
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2answers
671 views

What's the record for the fastest trip to the Moon?

The line "Therefore the USSR sent detailed instructions to Jodrell Bank how to find their second lunar probe, Luna 2, that was launched on 12 September 1959 and hit the moon the next day." from ...
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5answers
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What were the problems on the Apollo 11 lunar module?

In the movie First Man we see that there were problems with some button, when Buzz said "We should tell them about that." Also there was an alarm, that they then turned off.
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1answer
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Why is the ladder of the LM always in the dark side of the LM?

When landed on the moon, the ladder seems to be in the shadow for each Apollo mission. For example, on this photo, the ladder is not in the side exposed to the Sun. (the astronaut go out of the LM in ...
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1answer
370 views

Chandrayaan-2; time taken to get to the Moon

Depicted above is the print version of the July 02, 2019 Times of India article Why the world keeps returning to Chandamama which nicely surveys the large number of missions to the Moon. India is ...
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2answers
433 views

Could the Lunar Rover jump start the Lunar Module in an emergency?

In Scott Manley's video Why Lunar Landers Had Jumper Cables For Emergencies he describes the "LOSS OF ED [Explosive Device] SUB-SYSTEM" procedure, which includes the use of a jumper cable called the "...
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2answers
338 views

How do flags behave on the Moon?

I have seen many theories and question/answers on this site touching upon this subject but no focused question. So I would like to ask this as a two part question. Is what we saw in the Lunar ...
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2answers
8k views

Was planting UN flag on Moon ever discussed?

In the planning of the US missions to the moon was planting the UN flag ever discussed? It just seems to me that would have been a great public relations move.
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Cost of Lunar base in today's dollars: reference government report about a lunar base written in 2009? [closed]

What would the current cost be? Costs of an International Lunar Base from September 24, 2009 Below is a link: https://www.csis.org/analysis/costs-international-lunar-base
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1answer
146 views

What would a candle flame look like in low gravity?

We know what the flame of a candle looks like on Earth in 1g and what it looks like in weightlessness. But do we have an idea of what it would look like in Lunar (0.166 g) or Martian (0.38 g) gravity? ...
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3answers
4k views

Was it really necessary for the Lunar Module to have 2 stages?

We all know the 2 stages LM design used by Grumman was intended to discard the mass of the landing gear (+ other components) at the moment of launching off the Moon surface to reach back the Service ...
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2answers
3k views

Can we see the USA flag on the Moon from Earth? [duplicate]

Is it possible one day to see landing site flags on the Moon from Earth or from space without having to land using a telescope as technology progresses? Highly Related: Were the Apollo lunar ...
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1answer
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ELI5: Why do they say that Israel would have been the fourth country to land a spacecraft on the Moon and why do they call it low cost?

In the news they say that Israel hoped to become the fourth country to land a spacecraft on the Moon. Only government space agencies from the former Soviet Union, the US and China have made ...