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Questions tagged [crewed-spaceflight]

Crewed spaceflight (also referred to as human spaceflight or manned spaceflight) is space travel with a crew aboard the spacecraft. When a spacecraft is crewed, it can be operated directly, as opposed to being remotely operated or autonomous.

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1 answer
667 views

What effects would the longer days on Mars have on humans?

Afaik, humans never tried to live according to shorter or longer days so the Martian astronauts might be the first humans from Earth that have to follow a different cycle. The Martian day (Sol) is ...
4 votes
3 answers
304 views

How exactly would nuclear thermal or nuclear electric propulsion enable short duration human missions to Mars?

Today (May 1, 2024) NASA Administrator Bill Nelson testified before the House Science, Space, and Technology Committee that nuclear thermal propulsion would enable us to go faster to Mars. He said: ...
2 votes
2 answers
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Why didn't Crew 8 launch to an elliptical orbit with an apogee closer to the altitude of the space station?

Crew 8 launched to a 191x215km orbit (ref), but the ISS is orbiting at 425km (ref). I'm curious as to the reason why they didn't launch into, for example, a 191x425km orbit initially.
14 votes
3 answers
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Has any spacecraft had a way for the crew to escape during reentry?

All manned spacecraft to date have come back to Earth eventually, and when they do it's through a flaming ball of plasma. It seems too probable that this plasma would have a way of breaking things ...
8 votes
1 answer
979 views

How many minutes of Lunar Sim did Neil Armstrong get?

A quick follow-up to What were the differences between the LLRV and LLTV? These craft were provided with a zero-zero ejection seat. The above referenced article on Wikipedia mentions Neil Armstrong ...
6 votes
1 answer
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How much time does the ISS require in "non value adding activities"?

Generally, we can divide the things that a worker, in this case an astronaut, does, into two categories: Value adding: Activities which contribute directly towards the employer's goals. In a company, ...
5 votes
1 answer
180 views

Would max-Q coincide with the loudest/roughest part of the flight?

Say you're an astronaut on a ride to the ISS, and you have with you a very accurate clock, an automatic pressure sensor, and a high quality microphone. If you synchronized the sensor and microphone ...
2 votes
1 answer
198 views

When would the Soviets have landed on the moon, if NASA had not beaten them to it? [closed]

I know that after the untimely death of Korolev, the crewed moon mission was having struggles, but could they have overcome them? What would their timeline have been? Side question/pure conjecture: ...
12 votes
2 answers
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Do astronauts aboard ISS always follow orders?

There have been many documented cases of astronauts not following direct orders during the Skylab and Apollo missions. Some of these have been publicly reprimanded but most have not. Most of the ...
6 votes
2 answers
635 views

How closely can ground control monitor ISS astronauts?

How closely can ground control monitor astronauts aboard the ISS. Are there cameras or microphones that the ground can use to see and hear what's happening, or are they reliant on the crew to relay ...
2 votes
0 answers
186 views

How many bubble levels have been used in space? Were any of them used some place besides the Moon?

The lunar retroreflectors left by Apollo astronauts had bubble levels and Sun compasses to that they could be oriented correctly with respect to Earth's average direction. This was necessary to ...
1 vote
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Was there ever a crewed space mission that could possibly escape the solar system? [duplicate]

The German song "Major Tom" adds a twist onto David Bowie's "Space Oddity", by giving clues to the spacecraft commander Mayor Tom to deliberately abort the mission in favor of ...
8 votes
1 answer
276 views

Why is there no common "docking" interface for express rack payloads?

It seems strange to me that given all of the concerns about living space and color palette aboard ISS, the data/power/cooling ports for different mid-deck locker equivalent (MLE) express rack payloads ...
2 votes
4 answers
507 views

Microscopes in space?

There are a lot of telescopes in space (optical, radio, X-ray and Gamma-ray), but how about microscopes? Does the ISS have a general-purpose microscope? It could come in handy for failure analysis or ...
8 votes
1 answer
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Which astronaut has experienced the largest relativistic shift in time (relative to Earth's surface)?

Following this answer and then this question (where I've linked to Cosmonaut Sergei Krikalev; the World's Most Prolific Time Traveller) I've noticed that currently Krikalev does not hold the precisely ...
2 votes
0 answers
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How did the recovery of the first crewed Crew Dragon water recover differ from previous recoveries of Crew and Cargo flavors?

The NASA video Expedition 63 Inflight with New York Times, Fox News, and USA Today - July 7, 2020 includes an interview with Fox News reporter Bill Hemmer, who asks: I am most interested in your ...
7 votes
1 answer
251 views

How many hours/week on the ISS is spent on science vs maintenance?

This was asked in 2016 : Does ISS crew exercise time count toward their X hour work week? The answer as of 2016 was 40 hours / week for a crew of 6. But as noted there, when the crew size increases to ...
16 votes
2 answers
2k views

What is the most heated exoatmospheric conflict to-date?

This tweet by ISS Archaeology (quote-tweeting Norishige Kanai) got me wondering: with all the accumulated time humans have spent in space, surely there have been disagreements, frustration, and ...
11 votes
3 answers
2k views

An alternative architecture for a mission to Mars

This image, which is supposed to represent the current architecture of the mission to Mars by NASA, raised a wave of emotions. People find it too long and complicated. But is it really possible to ...
0 votes
2 answers
414 views

Looking for figures for contemporary interstellar engine options

So I have already done... a lot of reading on this subject lately. A lot. You wouldn't believe. My maths is... functional, probably far above 'average', but when it gets into the realms of the 'rocket ...
2 votes
0 answers
93 views

How to Analyze and Size Spacecraft Structures: Loads Development & Structural Dynamics

Hello, I'm a mechanical/aerospace design engineer trying to expand into structural analysis. What I'm looking for: A guide or summary as to 1) how spacecraft design loads are determined, and 2) how ...
5 votes
0 answers
118 views

What materials are used for human spacecraft pressure vessels and why?

I'm looking for what specific aluminum alloys are used for human-rated spacecraft pressure vessels (habitable module) and why. I've been able to find the material for Orion is Al-2219 but nothing for ...
13 votes
5 answers
2k views

Cyanobacteria as Life Support?

I'm aware that cyanobacteria are responsible for the Great Oxidation Event and are very effective at turning CO2 into oxygen so it stands to reason that with the proper nutrients for the bacteria, you ...
10 votes
2 answers
6k views

How was temperature and humidity maintained inside the Apollo mission capsules?

What mechanism was used to control the temperature and humidity inside the Apollo mission capsules? For example, did they employ an electric heater? Did they utilize solar radiation? Was humidity ...
1 vote
0 answers
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What are the prelaunch procedures that astronauts follow before the launch?

What procedures do the astronauts follow, like the suit-up procedures and communication checks that happen before the launch. And how will the astronaut's family meet the astronauts prior to the ...
11 votes
4 answers
15k views

Why don't we launch spacecraft from the Moon?

The Moon has less gravity than the Earth and its own orbital speed around the Earth removes some of the velocity required to leave the Earth-Moon space, right? We could send probes or spacecraft much ...
15 votes
3 answers
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Have there been any Spacewalks to free-flying satellites?

Talks of a new Hubble servicing mission have made me curious: Has a spacewalk between a crewed craft and a free-flying satellite ever occurred? As far as I am aware, the Shuttle visited satellites and ...
13 votes
2 answers
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What are the "insect antennae" on the MMU (Manned Maneuvering Unit)?

What are the “insect antennae” structures in front of the astronaut’s visor? They appear to be attached to the MMU, but do not appear in the MMU User Guide, static displays or Weightless Environment ...
4 votes
1 answer
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Shuttle-era mission profile for a desperation moon mission

It is 1996. For reasons best left to Worldbuilding SE, it has become a matter of civilizational life and death to send humans to the moon and bring them back to earth as soon as possible. Everybody is ...
5 votes
5 answers
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Why did the Space Race end on the Moon?

Why did both the USA and the USSR decide to put a person on the Moon and then 'end' the space race, having 'won'? Why didn't the space race go on infinitely: who would fly the first astronauts to ...
3 votes
1 answer
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Has intra-cranial pressure been measured on ISS astronauts for SANS research?

Visual impairment (VI) <and spaceflight-associated neuro-ocular syndrome (SANS)> is currently ... NASA's top health risk for long duration spaceflight, and millions of dollars has been allocated ...
3 votes
0 answers
192 views

Are there examples of spaceflight equipment being redesigned to remove right hand bias? (To make it less difficult to use left-handed)

Writing First left-handed primate on the Moon? First in space? got me thinking. The first left-handed astronaut may "break a barrier" but not all barrier-breakings result in an improvement ...
5 votes
2 answers
488 views

Are rockets deliberately throttled back towards the end of the burn to spare crew and airframe g-forces?

Throughout its burn, a rocket gets lighter as propellant is consumed. As a result, acceleration (and g-force) increase. In the shuttle, the SSMEs were throttled back towards the end of the burn ...
5 votes
3 answers
975 views

Is disabling glare common in space?

I'd like to know if astronauts have been under the effect of Disabling Glare, how easily this could accidentally happen and how long can last if this happen?
23 votes
1 answer
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What paper size do they use on the International Space Station?

We know they have at least one printer on the ISS – that's NASA-supplied so it would be in the US Orbital Segment. Presumably there is a printer in the Russian Orbital Segment as well. (Mir had a ...
2 votes
2 answers
320 views

What mission is this Chris Hadfield photo associated with and what is the location? And what is that thing?

Many, many astronauts have gone on to be wonderful orators, educators, advocates for science, education and positive thinking, Major Tom Colonel (ret) and (fmr) ISS Commander Chris Hadfield is just ...
16 votes
1 answer
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Which countries could launch a human into space on very short notice

I’m not sure if it's better to ask this here or on worldbuilding.se Which countries except Russia/China/US can launch their own crew into space and return them unharmed (if for some reason this really ...
6 votes
0 answers
112 views

Looking for Apollo Flight Control Hardware Blueprints (such as RHC, THC and COAS)

I've been looking to build replicas of Apollo flight control hardware such as RHC, THC, ACA, TTCA and COAS, and am looking for detailed engineering drawings that show dimensions and internal ...
0 votes
0 answers
172 views

Live_ISS_Stream stopped?

so I've come across this video, 11 hours of ISS transmissions during 2021 ASAT incident by Russia. The description says the footage was archived from this IBM stream site, so I've looked to see if it ...
9 votes
1 answer
3k views

What are the movable-plastic-bag-looking things on the nose of Shuttle?

I was watching the last launch of Space Shuttle Atlantis (STS-132) and noticed some objects that moved during the launch. I was curious about what these objects were and why they were positioned that ...
4 votes
2 answers
376 views

How many printed novels have been in space to date?

I am talking about actual novels brought for recreational purposes. As in manuals don't count. Also, I would like to know who and on what mission these were brought.
2 votes
0 answers
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Semi-interdependant Jovian Colony [closed]

Given the low $\Delta v$ needed to transfer between the moons of Jupiter even just between the Galilean large moons, and the distribution of heavier molecules and atoms towards the inner system (Io + ...
3 votes
1 answer
219 views

How long would it take to travel from the moon to the asteroid belt/Jupiter with fusion powered space travel?

I am writing a science fiction story that involves fusion powered space travel, but not constant acceleration like in the Expanse. Instead, the manned spacecraft accelerates at the beginning of the ...
6 votes
1 answer
880 views

Manned Spacecraft/Space Station design Requirements

I am looking for some document that summarizes all the aspects that need to be taken care of during design (structural resistance, life support system, thermal regulation, etc.). Something similar to ...
12 votes
2 answers
341 views

Is the vestibular system ever useful in spaceflight?

The Vintage Space video Eleven Deaf Men Helped NASA Leave Earth describes a number of different NASA experiments done on human subjects who had damaged vestibular systems due to childhood illness. ...
4 votes
1 answer
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Radiation Challenges of Crewed Gas Giant Missions

I was thinking about how easy it would be to perform a crewed tour of the Jovian/Saturnian moons, given the low DeltaV, and the abundant opportunities for potential ISRU. Then, I remembered with that ...
-7 votes
1 answer
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Wouldn't it be easier to send human heads instead entire human bodies for space exploration? [closed]

A major part of what makes human space exploration extremely difficult is the infrastructure required to support the human body outside earth. It requires resources just to launch into space due to ...
4 votes
1 answer
494 views

How does SpaceX get through regulatory issues so quickly?

"Regulatory" isn't the right word, but I don't know what is. For example, SpaceX seemed to be able to prove to NASA's satisfaction that they were sufficiently safe to use for crewed launches ...
3 votes
1 answer
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Gemini Ejection seat usage during late stages of reentry

Gemini in one way or another was a somewhat unique spacecraft. One such unique feature was having a ejection seat. While reading trough the document Development and qualification of gemini escape ...
10 votes
1 answer
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Why were ejection seats used in Project Gemini instead of a tower escape system?

In Project Gemini, the Titan II GLV space rocket used as fuel hydrazine and nitrogen tetroxide, so safety concerns over its toxic propellants were present. But along with the special care that was ...

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