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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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Blimp on Earth, but a glider on Mars?

Could enough surface area be created with a blimp to shed speed using Mars' atmosphere to have a controlled soft landing to minimize the need for retrorockets? Runway would need to be in place. While ...
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How does the freon compressor work at 0 gravity?

As far as I researched the Freon compressor to cool air has to stay up right not to leak oil into the system? So how does one work in space? What do they use to cool of the air?
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Rationale for human presence on Mars in the Apollo era

The Apollo program was motivated by politics; no matter that the Apollo program was conceived before Kennedy's speech, the commitment to make it happen was driven by the need to demonstrate an ...
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Why did the design for Space Shuttle docking change?

While browsing concepts of Space Station Freedom and other '80s NASA concepts (I love concept art), I noticed that there are some interesting differences in how the Shuttle was intended to dock with a ...
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How often has the ISS been physically vacant (un-manned)?

Currently six great folks are working in the International Space Station (ISS). I am wondering if it is ever vacant and if there's a rule of thumb (magnitude of order of days, an average or anything) ...
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are there any posters available with all astronauts/cosmonauts?

The only poster imaging all astronauts at that time I am aware is the one created by NASA in 1967. Are there any follow ups with meanwhile 550 space travellers?
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Muscle loss in space

Since loss of muscle is such a big problem in extended space travel I wondered (and practicalty is a different issue) if astronauts could maintain muscle mass by donning oxygen masks and playing a ...
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How many people have returned to Earth in a different type of vehicle than the one that launched them into space?

Recently we had the 15 year anniversary of Expedition 1 of the ISS. That particular crew launched in a Soyuz (TM-31) and returned on a Space Shuttle (Discovery, STS-102), which I found a remarkable ...
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how long does it take to have an emergency crewed space launch?

The objective is to launch a crewed spacecraft to lower Earth orbit. Except the perigee must be higher than 100km altitude, there is no other constrain on the orbit parameters. The emphasis is that ...
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What would astronauts do in the unlikely event an hole appeared on the side of their spacecraft? [duplicate]

This never really happened in the Apollo missions, or any other rocket launch... but what would theoretically happen if something exploded (let's say, the oxygen tanks) and caused a hole in the side ...
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Did early Russian capsules really have “Human Inside” labels?

This comic claims that it was to prevent people panicking and attacking the crew. However, Vostok pilots were supposed to land separately from the capsule. Are there any photos supporting this claim? ...
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Could a person survive a vent of a compartment large enough to extinguish a fire?

Suppose there is a fire inside a large spacecraft, and there are crewmembers trapped inside. Is it possible to extinguish the fire by venting and then repressurizing the cabin, without killing the ...
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Brown dwarfs: could they be used to gain velocity in either a gravity-assisted slingshot or an Oberth maneuver? Why or why not?

Are brown dwarfs useful for gaining velocity via gravitational slingshot (or Oberth Maneuver, I'm still fuzzy on the difference to be honest) by a theoretical starship with fusion propulsion looking ...
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How do cosmonauts on the ISS use the washroom and excrete there? [duplicate]

I had doubts about what cosmonauts do in space when they are about to excrete, is there any toilet and a tank to store the waste ?
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Are the Boeing CST-100 Starliner and Orion MPCV interchangeable at any level?

Although the Boeing CST-100 Starliner and the Orion MPCV are designed for different missions (LEO vs beyond LEO), one might imagine a mission which could be served by either vehicle. Presumably, both ...
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What prevents the current Dragon capsule being used for crew?

Hypothetically, why could the current Dragon not be used for carrying astronauts from space? Since there is always some research material in Dragon, I believe this vehicle has e.g. heat shields. Is ...
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What are the most serious injuries that astronauts have suffered while in orbit?

Among astronauts in orbit, what is the worst real injury recorded? Has anyone hit himself on the thumb with a hammer or something? Squeezed a finger in a closing door? Gotten poisoned by some leaking ...
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What does space look like from space?

We've all seen tons of images taken by astronauts and spacecraft, but many times they are artificially colored, include invisible light spectrums, or have a lot of contrast. I would imagine, without ...
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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 ...
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Are any parts of the Soyuz capsule re-used or re-manufactured?

Are any parts of the Soyuz capsule re-used or re-manufactured? From a previous post I know it is much too expensive to design the spacecraft for re-use or re-inspection, but can any components be ...
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Where do the crew sleep on the ISS? Where are the sleeping quarters?

The ISS currently handles a crew of 6 launched by two Soyuz vehicles. With the advent of Commercial Crew bring 4 a mission, the hope is to run a crew of 7. Where in the ISS do the crew sleep? The ...
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What will the new rules, guideliness, and safety measure be for the ISS after NASA kicks out Soyuz?

Will US Policy be that there should be two Boeing CST-100 Starliner or SpaceX Dragon V2 craft attached to ISS at all times for the American segment of the station? Will Soyuz continue to be used?
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Would the Moon be a better place than Mars anyways? [duplicate]

Wouldn't the Moon be a better place to send people than Mars? If our goal is to really let humans live on a body other than the Earth, why not use transportation that was already worked-out when most ...
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Do astronauts also have a lack of certain radiation which they had on Earth but not in space?

You could think perhaps about sunlight. But a while ago I've read something about astronauts missing some other 'strange' radiation. I forgot what is exactly was. But could it be for example a kind of ...
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Will suits worn on Mars lose kilograms of “expendable water” each time they are used?

In this excellent answer I learned that space suits from the Apollo missions and even when used in space walks from the ISS today use water sublimation to remove both body heat and other heat ...
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Soyuz TMA-19M return

The launch of the next crew to ISS with Soyuz MS 1 has been delayed. Why the return date of the current crew on Soyuz TMA 19M remains unchanged? An extension of their mission for ca. 2 weeks would ...
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Why does NASA not replicate existing manned launch systems?

Since the retirement of the Space Shuttle, NASA has depended on contracts with Russia to launch manned vehicles to the International Space Station. The specifics for other manned spacecraft must be ...
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Did USSR discontinue radio transmissions, relocate ships, to aid the US in response to Apollo 13?

In this article there is following statement by Dr. Ernst Stuhlinger: Let me only remind you of the recent near-tragedy of Apollo 13. When the time of the crucial reentry of the astronauts ...
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1answer
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Why do Astro/Cosmonauts refer to things as Russian or American?

I'm watching CSA videos, and have watched numerous documentaries before, and have noticed that both Astronauts and Cosmonauts alike aboard the ISS tend to refer to something as either Russian, or ...
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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 ...
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Any interest in crewed mission to Mars without landing?

Would there be any interest in a manned mission to Mars without landing? This could consists of none (just a flyby) to many revolution(s) around the planet. Would it cut a consequent part of the cost ...
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What is the distance of the Sun-Jupiter L4 and L5 points relative to Jupiter?

What is the distance between Jupiter and the L4 and L5 points of the Sun-Jupiter system? I need it to attempt to calculate the $\Delta v$ needed to reach Jupiter from there.
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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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Was footage released of the Soyuz TMA-20M crew arrival ceremony?

I couldn't find a YouTube video of the welcome ceremony of the newly arrived crew of Soyuz TMA-20M. Was there no broadcast on NASA TV of this event?
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Could humans live in microgravity indefinitely? [closed]

Astronauts have to exercise daily to prevent bone and muscle loss during long stays on space stations, but I assume this is all in preparation for when they return to the normal gravity of Earth. If ...
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2answers
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Could we launch a rubble pile simulant to LEO for astronauts to practice on before visiting natural milligravity objects?

There are proposals and maybe serious plans to send astronauts to asteroids or Mars' moons, objects which are a few kilometers or just a few meters in diameter. I call them "milligravity" objects ...
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What is the disk on NASA's anti-matter concept design?

On the concept art pictured in this link, we see a very sleek looking ship that would supposedly be powered by antimatter. What is the large disk present on the side of what appears to be the second ...
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4answers
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What is the closest to a perpetual motion machine that could be made to work in space?

In the movie "Alien" by Ridley Scott, there's a Drinking Bird which, presumably, the crew activated when entering stasis, and which is still going after they emerge. However anyone who has had one of ...
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Which current (2016) ISS resupply vehicles are human-rated, and how many astronauts can they each support?

Based on the situation in 2016: Which vehicles that are in use for ISS resupply missions are human-rated by any space agency? (Bonus points for a list broken down by country of origin and/or the ...
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How would a manned Mars mission keep from contaminating Mars?

It occurred to me that EVAs on the Martian surface would be liable to bring biologicals from Earth out into the Martian environment. A habitat will become contaminated with bacteria from the humans ...
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Is it possible to build a rocket from EBay [duplicate]

I want to write a young adults fiction book about a girl who buys an astronauts helmet from EBay and decides to see if she can then build a rocket to get to the moon. I'm a materials engineer, and ...
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I'm planning a roadtrip to the moon. What is going to be my best transfer orbit? How far will it be?

Fed up with clouds ruining clear nights here on earth, I point my car upwards, and head for the moon. My car can provide the same amount of relative thrust it can going 65 mph, simply in whatever ...
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1answer
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Do astronauts hear audible creaking from spacecraft structures?

I once heard an audio tape compiled from data downloads from a high rate accelerometer on the Olympus satellite, from which one could hear thruster firings, valve switching and reaction wheel ...
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2answers
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What advancements towards Mars were made during Scott Kelly and Mikhail Kornienko's “1 year” journey?

First there's the annoying part where everyone says it was a year but the actual flight time was less than a year. It is only a year in the sense that they launched and landed in March. But getting ...
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2answers
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Effects of microgravity on human body in a days time

Many websites tell me effects of microgravity on the human body over a period of months. However nothing about the immediate effects of it. Could it be because there isn't any? I once read that fluid ...
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3answers
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Miles-per-second around the earth vs. miles-per-hour? [closed]

Watching Astronaut Scott Kelly and his crew members emerge from the Soyuz capsule tonight, I'm curious why television experts say their free-fall in orbit is at a whopping 5 miles per second instead ...
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How would a manned Mars Lander be tested

This question just occured to me while I was setting up my first manned (err, kerbalized?) Duna mission in KSP: In order to test my basic lander design I did not want to start a whole Duna Mission but ...
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When have astronauts been launched without launch escape system (tower)?

The Vostok spacecraft used by Yuri Gagarin seems to have had an "ejection seat". The Soyuz launcher has an escape tower, which at least once saved its crew. The space shuttle of course did not have ...
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Are any rockets currently in use capable of putting a man on the Moon?

Apollo 11 used the Saturn V rocket, which is no longer produced. As far as I can tell, Atlas V rockets are not as powerful and would not be able to deliver the lunar lander to the surface of the Moon. ...
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What was the reason for an odd number of astronauts in almost every group of the early US space program?

We are familiar with the first groups of NASA astronauts, like the Mercury Seven and the New Nine. Something about that struck me as (literary) odd; All the first twelve astronaut groups had an odd ...