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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Thermal management of manned craft at Ceres

I would like help in designing a manned craft for exploration and mining activities on Ceres. The sunlight reaching Ceres is approx 10% of that in LEO. Does this mean the spacecraft would have ...
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Why is the Fuji capsule design philosophy not seen in other proposals?

Fuji is my favorite unflown dead spacecraft proposal (narrowly beating out Dynasoar). I am well aware of why Fuji has its weird/unique design, but what I'm curious about is why it's unique. In my ...
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Why does the ISS occasionally operate with just 3 crew members?

There have many instances where the ISS only has 3 crew members, often for many weeks. This places significant strain on workload and productivity. Why isn't a new crew launched quicker?
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Why are we still giving medical support to astronauts after they land? Or any support for that matter?

Besides moving the astronauts around, what are the medical team needed for? I assume they are already wearing some type of monitors for heart/breathing/etc. A call on the radio can confirm if they are ...
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Are there any crewed missions planned or designed for high orbit/cislunar space?

We talk a lot about going to The Moon again, but what about very high Earth orbit, say geostationary and beyond? Are there any plans for crewed missions? If so, what would their goals have been? ...
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Why didn't NASA re-use more astronaut crew members?

According to a popular space exploration web site, 355 individuals few in a total of 833 crew slots in the Space Shuttle program. That's an average of about 2.5 flights per astronaut, though many only ...
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What is the maximum thrust a pressure-fed methalox engine can produce?

SpaceX revealed on 4/30/2020 a new version of Starship designed to land humans on the Moon. Auxiliary engines are mounted high on the body for the last part of the descent, apparently to eliminate the ...
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How do we control a Reentering Capsule in the denser part of the atmosphere?

My question is: How do we control a Reentering Capsule in the denser part of the atmosphere? How does the aerodynamics of the Reentry vehicle workout? In other words, how does a reentry module ...
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What are some details of ISRO's Gaganyaan Mission?

What are the some design features of Indian Human spaceflight Programme's Gaganyaan capsule? How much of the testing is done and what are its future plans?
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Mars Crewed Missions: Use of In-Situ Resource Utilisation (ISRU) for the Return Trip Propellant

From what I've read from NASA's Mars Design Reference Architecture (DRA) 5.0 and other articles, the use of ISRU for the ascent vehicle propellant is usually considered (be it atmospheric based, ...
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Are there any plans for an astronaut's two-year stay on the ISS? If no, why not?

A manned Mars mission would last about two Earth years. However no astronaut was continuously in outer space for that long, the record are Valery Polyakov's 437 days on Mir. If SpaceX wants to send ...
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Why so many laptops on the ISS?

By all reports, there are dozens of laptops on the ISS - more than 12 of them for every crew member. I understand that they are used as control consoles for various equipment that isn't safety-...
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Will crewed vehicles ever follow multi-flyby trajectories?

A while ago, I asked a similar question here, but I think it was confusing, so nobody answered. Two questions: This one is a bit subjective: Do you think that lengthy (+5y) multi-flyby trajectories ...
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Are there any at least somewhat authoritative estimates of how long it will be before people will land on Mars and setting up camp?

While the naive but perfectly valid question Are they building on mars or do they have a camp there? was closed and overly downvoted, I think my answer there was reasonable; the perception by the lay ...
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Were crew assignments ever made to avoid grouping astronauts with similar first names?

Thinking primarily of the Apollo missions with this question, but could be expanded in an answer with a more general response, if appropriate... With several Apollo-era astronauts sharing similar-...
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Are they building on mars or do they have a camp there? [closed]

They are making vehicles to go to mars with and they haven't gone yet. And it is said that they want to camp there and bring people and even have a space camp.
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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 ...
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What specific contributions have ballooning experiments made to manned space flight?

I am vaguely aware that the US space program wasn't just kicked off after Sputnik. There is a history of balloons and sounding rockets that never seem to get mentioned in the books I've read, and ...
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What are the cutting edge materials & strategies which could be used for radiation shielding on long-duration missions?

Astronauts on future long-duration missions will be exposed to different kinds of ionizing radiations, Earth's plasmashpere and Van Allens radiation belts, solar flares and galactic cosmic rays. What ...
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How is the water from a launchpad recovered? (If it is)

Knowing that the water on a launch is used for both noise suppression and surface cooling, do they recover the water that isn’t evaporated by the launch to use again? And if they do, how so?
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Would a manned spacecraft on a Mars mission need large windows?

I'm thinking of scenes like this from the film The Martian, where we see large picture windows in one of the modules in the Ares III. Wouldn't the windows look out onto either black space or the Sun ...
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Can the different “additional” demands on the Space Shuttle be broken down in terms of additional demands on hardware? How so?

Related: Could Space Shuttle's wings be diminished? During the sanctioning and early development of the Space Shuttle, things got somewhat budget-political, and a number of additional design ...
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Will astronauts on the way to mars do experiments like in orbital labs?

Astronauts on Mars-bound missions will be stuck in their spacecraft for months on end. I could find many articles on what psychological issues will have to be faced, how they may/will be faced, how ...
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If the ISS had an emergency, how long would it take to get a rocket to it?

If there was an urgent need to launch a rocket to the ISS, how long would it take to have a rocket ready to launch? I am trying to understand what factors take up the time to prepare for a rocket ...
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How much nitrogen did Skylab and the Space Shuttle carry for atmosphere makeup?

This comment below Where there any spacecraft with nitrogen-oxygen atmosphere, but without a system for nitrogen replenishment? mentions: Both Skylab and shuttle had N2 tanks for atmosphere makeup. ...
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Were there any spacecraft with nitrogen-oxygen atmosphere, but without a system for nitrogen replenishment?

When watching the Vintage Space video Apollo’s Flammable Oxygen Atmosphere Explained, I started to think: was there ever any spacecraft proposed with nitrogen-oxygen atmosphere, but without a system ...
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Would astronauts on the ISS be affected by the radiation from a global nuclear war?

I was wondering what would happen to the ISS astronauts if some global disaster wiped out all ground support. This question tells us that a 2-person crew might survive up to a year on stockpiled food ...
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Long term sustainability of Space Flight

What are some of the known risks towards long term sustainability of manned space missions? Or put another way: What are the limited resources that could keep a future mankind grounded?
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Is going to Ceres “as easy as going to Mars” like this aerospace engineer says?

According to aerospace engineer James Longuski of Purdue University in Indiana, We can go to Ceres as easily as Mars The key technology that a human mission to Ceres needs to develop is a ...
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Has there ever been crewed mission plans by any Space Agency to go to a solar system object other than the Moon and Mars?

As we know there are crewed mission plans to go to Mars and people has been in the Moon already. Has there ever been crewed mission plans by any Space Agency, to go to a solar system object other than ...
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What are “applied moments of inertia” in the context of STS-61B's EASE/ACCESS?

This answer links to https://history.nasa.gov/spacesuits.pdf which shows the image below. (fyi Wikipedia's STS-61 is not to be confused with STS-61A, STS-61B or STS-61C, see answers to Why so many STS-...
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SpaceX Crew Dragon depressurization for emergency EVA

As far as I know, the Crew Dragon does not have an airlock. Therefore, if astronauts inside needed to go outside for some reason, they'd need to suit up, depressurize the cabin, and then they'd be ...
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How long can Crew Dragon stay at ISS?

It appears that the first manned Crew Dragon flight to ISS may be extended due to there being only one US astronaut there. NASA is also trying to determine how long Dragon's first crewed mission ...
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IVA space Suit leakage

What is the allowed suit leakage for Sokol suit at 40kPa/5.8 psi. What is the allowed leak rate in IVA shuttle suits at 24 kPa/3.5 psi. What is the allowed leak rate from IVA suit helmet
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How to estimate which astronaut ends up furthest from the ISS after one orbit?

Three astronauts; Goofus, Gallant and Zippy the Pinhead play a game. All three take their cold gas thruster-powered jet packs and quickly move 100 meters away from the ISS. For some reason after ...
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Does the speed of ISS slow down at the time of a spacewalk or does it become stationary?

The International Space Station (ISS) is orbiting at nearly 7.66 km/s. At such high speeds, how do astronauts perform tasks outside the ISS? Or is it all relative like astronauts are having same speed ...
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Why do SpaceX expect the Falcon 9 rocket to explode during the in flight abort test?

This article - https://futurism.com/spacex-blow-falcon-9-rocket-launch/amp - states that after 88 seconds, the first stage engines will shut down, and an automated abort command will be sent to the ...
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Would it be possible to grab on to a satellite, and use it to keep yourself in orbit in an emergency situation?

You are orbiting Earth when your spacecraft falls apart and you are left flying through space. Will your spacesuit keep you alive long enough to be rescued? Or will your orbit lower to quickly and you ...
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Dealing with lunar regolith

NASA has announced its intention to return astronauts to the Moon by 2024. Various other questions and answers here address the many dangers and difficulties posed by the fine and abrasive particles ...
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Given unlimited funding and global cooperation, could there have been a manned space craft made in the year 1850-1860? [closed]

All my life, I've been speculating in my head about all kinds of "alternative timelines". One of the most intriguing to me are all the ones that concern space and "steampunk" technology. Recently, I ...
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Mars and back, staying only a few days

This article states that once you arrive at Mars you'll only have a couple of weeks before you'd have to begin a fresh Hohmann transfer back to Earth, otherwise you'll have to hang out on Mars for ...
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Potential catastrophic death on the ISS from mistakes

Other than from decompression and fire, what other ways has NASA or the Russian space program identified unique ways someone on the ISS could die suddenly, in particular from human error with the ...
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How long will Blue Origin's New Shepard space tourist flights last?

I tried searching for this, but everything I found says the New Shepard flights will last only a few minutes. Does Blue Origin have stated (or show evidence of likely future) plans for the ...
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Have there been any spacecraft designs with a bilaterally asymmetric cockpit?

One of the things that makes the Star Wars films so visually distinctive is the asymmetric spaceships, for example the Millennium Falcon below whose cockpit is located in the top right corner as ...
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What does NASA intend to do about the Martian day in regards to the astronauts who go there?

The Martian day is about 40 minutes longer than an Earth day. What does NASA intend to do about the Martian day in regards to the Mars mission? Will they adjust the astronauts to their landing day ...
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Can jet engines be used to launch a rocket?

Following up on my previous question Can a VASIMR Plasma engine be used to launch a rocket?, I was told that VASIMR plasma thrusters are inefficient in an atmosphere. I then had the idea of using jet ...
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Can a VASIMR Plasma engine be used to launch a rocket?

When I was in primary school, I spent countless hours designing spaceships that probably wouldn’t work. It’s only now that I’ve stumbled across some of the old drawings and actually thought if it ...
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How much piloting did the Apollo astronauts actually do?

I understand Armstrong landed the Eagle manually, and Apollo 13 did a manual burn. Other than emergencies like that, did the Apollo astronauts do much piloting of the spacecraft.
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Astronauts' sleeping heart rate on the ISS

On Earth during non-REM sleep a person's heart rate goes down. Does the same thing happen on the ISS, or does the non-REM sleeping heart rate remain close to the heart rate of the astronaut while ...
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Solutions for transporting water to space

If water is the cheapest, and most usable radiation shield material for human space travel, how do we get large amounts of it to orbit?

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