Questions tagged [astronauts]

Questions regarding people present on spacecraft or space stations.

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8
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1answer
826 views

How much jerk do astronauts experience? Is there a safety limit?

From Wikipedia: In physics, jerk is the rate of change of acceleration; that is, the derivative of acceleration with respect to time, and as such the second derivative of velocity, or the third ...
3
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0answers
75 views

Are alternatives to spacesuits, like one person pods, being developed? [duplicate]

I'm thinking that for extended zero gee extravehicular activities (say space construction) a single person pod (if that's the right word) would be more all round useful than a space suit. Faceplate ...
14
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1answer
501 views

Astronaut orientation etiquette

How does the microgravity environment on the ISS change how people interact or converse? Is it polite or common to be oriented the same direction as who you're talking to? Also, when you see new ...
1
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1answer
187 views

Were there special circumstances leading to these astronauts' spacewalking 5 days after arrival at the ISS?

@This answer describes two cases where astronauts performed space walks less than six days after arriving at the ISS; Timothy Kopra (Expedition 46) Andrew Feustel and Richard Arnold (Expedition 55) ...
0
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1answer
112 views

Are there rules, policies, or guidelines regarding spacewalking soon after launch?

In light of this answer, where except for a few cases, space walks from the ISS are usually performed starting about a month after arrival at the ISS, are there any rules, policies, or guidelines that ...
3
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1answer
354 views

Who is the unnamed astronaut in this uncredited photo used in commercial promotional material?

When I linked back to Do ISS astronauts notice, or experience symptoms of elevated CO2 levels? Do they wear monitors regularly? in this question, I was surprised to find that I hadn't named the ...
11
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2answers
4k views

What is Astronaut Sunita Williams wearing on their wrist?

The most recent installment of NPR's Brave New Workers A NASA Astronaut Stays In Orbit With SpaceX And Boeing (article & podcast) covers Astronaut Sunita Williams extremely cool new job. She's ...
3
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0answers
106 views

What are the physical requirements of an astronaut for a Mars mission likely to be?

I realize that there's a lot of speculation involved here, but current actual mission profiles have PT programs and general wellness specifications. It seems like the qualifications would be a ...
4
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2answers
1k views

When astronauts or cosmonauts get seated in the spacecraft, are they actually sitting up or lying down?

This might be more of a physics question. If it is, I'll post it in the physics site. If the spacecraft is vertical, wouldn't the astronauts be seated in a lying position so that the G forces do not ...
17
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4answers
2k views

How were the pilots of the space shuttle able to operate the rudder after time in space?

I've just watched this video showing three astronauts who've returned from space. At around the 5:46 mark in the video we can see astronaut Chris Hadfield being carried out of the Soyuz capsule. I've ...
3
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1answer
526 views

As they were all qualified, how/why were the Apollo Astronauts chosen for their individual missions? [duplicate]

Why did some fly multiple Apollo missions, while others flew only once?
6
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1answer
1k views

How did astronaut Ellison Onizuka's words end up in my passport?

Astronaut Jack Fischer's Tweet about the late Ellison Onizuka (lost in the shuttle Challenger disaster) mentions that Onizuka is quoted in US passports. I looked, and sure enough it's there, right ...
4
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1answer
202 views

Origin and history of the traditional tree planting ceremony at the Cosmonaut Hotel?

Looking through NASA Johnson's Flickr I saw this photo (and also this one). The complete caption is shown below. Expedition 49 Preflight nhq201609160011 (09/16/2016) --- Expedition 49 flight engineer ...
13
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2answers
2k views

Do ISS astronauts notice, or experience symptoms of elevated CO2 levels? Do they wear monitors regularly?

A recent (Sept. 2017) news item on the company website of Gas Sensing Solutions Innovative sensor technology assists NASA with vital wearable CO2 monitoring equipment caught my eye. A section of the ...
6
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2answers
485 views

Did any astronaut take a Bible into space?

I am wondering if any astronauts took a copy of the Holy Bible into space. I know the crew of Apollo 8 read part of Genesis 1 in space, but I am wondering if anyone took a full Holy Bible into space.
15
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2answers
3k views

Why are these astronauts green?

The Space.com article Space Station Crew Returns to Earth Tonight: Watch It Live leads with a photo of three astronauts on the ISS that are backlit with bright green light, which can also be seen ...
27
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2answers
3k views

Were cosmonauts equipped with poison pills?

It's frequently claimed without citation that Alexey Leonov carried a poison pill of some kind during his Voskhod 2 spacewalk mission, to commit suicide should he be unable to re-enter the spacecraft. ...
2
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1answer
425 views

Is this the only eclipse where Moon's shadow on the Earth (umbra) has been photographed by a person in space?

In this nice video musing about (among other things) the US Naval Observatory's $3,500 expedition to Baker City or at least Baker County Oregon to observe the June 18, 1918 solar eclipse, there is ...
9
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1answer
9k views

Can astronauts wear eyeglasses inside their helmets during launches and landings?

Are astronauts allowed to wear their eyeglasses inside their helmets during launches and landings?? Are there any special considerations or rules? During spaceflight (launches and landings) there can ...
21
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4answers
7k views

Why doesn't the ISS start to spin if people walk inside?

I have read that prior to launch all people and tools are fastened down to prevent a rocket from losing the balance. Why doesn't the ISS begin to spin as astronauts are walking inside of it? Or is ...
-3
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1answer
340 views

Sharing the skies with Russia, for how long? [closed]

Everyone knows that there are tensions with Russia that have existed for years. At what point do they stop cooperating with NASA and the USG in general? Have there never been worries about what ...
9
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1answer
721 views

Can you enjoy a cold carbonated drink in space?

I will grant that launching a can of soda pop, or beer into space would be very expensive. Alternately it is not unreasonable to make it in the space station, carbonated drink makers are easily ...
9
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1answer
1k views

How did Alexey Leonov bleed off the pressure in his space suit?

On the Voskhod 2 mission, cosmonaut Alexey Leonov performed a spacewalk which ran into issues when Lenov's spacesuit had some sort of pressure buildup. From the wiki - [Leonov] was forced to bleed ...
23
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1answer
988 views

Does SpaceX have any significant additional legal hurdles for flying private citizens around the moon?

SpaceX recently announced they are planning to fly two private citizens around the moon. I'm sure a normal space flight has all sorts of legal complications, but does the addition of 2 private ...
1
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1answer
180 views

What happens to a spacecraft in flyby Mission?

I am not a science guy, So I have couple of questions I want to know what happens to a spacecraft whose mission is to flyby a planet E.G. Mariner 4 Also Viking 1 (lander mission) is it still on mars?...
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4answers
55k views

How tall do you have to be to be an astronaut?

Currently I am 13 years old and the thought of space amazes me. I am 5 feet 7 inches (1.7 m) tall. I researched how tall you had to be to be an astronaut. Sites agreed and disagreed, throwing out a ...
4
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1answer
6k views

How many countries have sent personnel to the ISS?

How many countries have sent astronauts or other trained personnel to the International Space Station?
7
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3answers
951 views

How many earth stations had astronauts on-site during John Glenn's orbit in Friendship-7?

The Washington Post just republished it's February 21, 1962 article covering the launch, Earth orbit, and safe re-entry and recovery of (Senator) John H. Glenn, in recognition of his service and ...
3
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1answer
342 views

How long can an astronaut stay in space and later have children?

While reading about the effects of microgravity on reproduction I was thinking about all the other aspects of space flight and how they may decrease fertility in both men or women (such as changes in ...
15
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1answer
819 views

Does having only 3 people on the ISS create workload problems?

There are a couple of quick ways to check the number of people in space, right now there are 3. Usually the ISS has a crew of 6. The launch planned for the other 3 crew was delayed indefinitely due to ...
3
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1answer
260 views

Is printing boarding pass to space a common practice?

I saw these boarding passes the other day in JAL museum. Funny enough, since it's printed by JAL, which does not fly to space yet, I guess this should be considered as a correspondence flight :) ...
10
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2answers
535 views

Who is the space artist? Patterns on the Spheres robots on the ISS

The August 24, 2016 NASA news item: New NASA Record Holder For Cumulative Days in Space congratulates ISS station commander Jeff Williams for passing 520 total days in space - a new NASA astronaut ...
7
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2answers
865 views

What happens to a body, that has been exposed to vacuum, once brought back onboard?

You are on a ship in the cold vacuum of space. You find a body of an astronaut exposed to vacuum (for this instance just assume human, but you never know). The body was essentially freeze dried and ...
37
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7answers
10k views

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 ...
3
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0answers
129 views

Astronauts with oversensitive skin after returning from space

I have heard that some astronaut (maybe Scott Kelly) complained about itchy, sensitive skin after returning from space. Is it true? After growing 2 inches, now he can't sleep on a bed and wear Earth ...
12
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2answers
2k views

What would happen if an Apollo astronaut landed on Pluto?

Pluto seems to be composed of Nitrogen and other ices that would be fluid or gaseous at higher temperatures. So what would happen if an astronaut using an Apollo era space-suit (crucially with that ...
2
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2answers
301 views

Why did these cosmonauts retire early in their careers?

Is it known why Roman Romanenko and Dmitry Kondratyev retired early in their careers as cosmonauts?
5
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1answer
841 views

In what way is artificial gravity expected to avoid/reduce bone loss?

It's my perception that discussions of the use of artificial gravity for manned deep-space travel missions are primarily centered on avoiding bone loss. Am I right so far? Microgravity seems to be ...
1
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3answers
592 views

How would travel to Mars without artificial gravity affect a crew's initial experience in Mars gravity?

This answer and the linked YouTube video discuss some difficulties with the experience of artificial "gravity" generated by small rotating craft (like one that could be launched to Mars in the near ...
7
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1answer
262 views

How might artificial gravity experiments be conducted to determine adaptation in mice?

Astronauts in microgravity for extended periods experience a number of maladaptations, including bone loss, muscle atrophy and muscle mass loss, redistribution of fluids, and reduction in immune ...
10
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1answer
4k views

How have space suits dissipated the heat removed from astronauts?

I never thought about this until reading the comments below this answer. To radiate something like 150W (a very conservative lower limit of human + suit systems heat production - see @Uwe 's comment ...
12
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1answer
1k views

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 ...
14
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1answer
1k views

Scott Kelly age vs Twin's

Scott Kelly just returned from nearly a year of orbiting the Earth in the space station. How much younger is he than his twin, now that he has spent a significant amount of time, traveling at high ...
6
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1answer
1k views

Why was Buzz Aldrin not Awarded the Congressional Space Medal of Honor? [closed]

According to the award's requirements, the Congressional Space Medal of Honor may be awarded to "any astronaut who, in the performance of his duties, has distinguished himself by exceptionally ...
10
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1answer
3k views

How many astronauts are left handed?

One kind of 'popular science' fun facts that is very popular is to show how many of the individuals belonging to a notable group of people that are left handed, often showing a large disproportionally ...
13
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4answers
1k views

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 ...
14
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3answers
1k views

How many seconds of near-zero gravity are practical with a Reduced Gravity Aircraft?

When I saw "50 seconds of weightlessness" (see quote below) I made a very rough estimate based on 45 degrees nose-up to 45 degrees nose-down Reduced Gravity Flight centered at about 35,000 feet where ...
11
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1answer
1k views

How is ISS commander chosen?

I've been looking at the ISS's List of International Space Station expeditions, and I'm curious about how the commanders are chosen. I can't really find anything that stands out. Sometimes the ...
8
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2answers
2k views

Oxygen toxicity vs Apollo mission preparation

In the article on Apollo command module design, I read: The cabin atmosphere at launch was changed to 60% oxygen and 40% nitrogen at sea-level pressure: 14.7 psi (10.1 N/cm2). During ascent the cabin ...
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0answers
113 views

NASA Astronaut Group 2 Press Conference

Is there footage of the NASA Astronaut Group 2 press conference online? I can watch the press conference for the Mercury astronauts here, but can't find Group 2 footage. I've seen snippets of the 1962 ...