Skip to main content
67 votes
Accepted

Why do ISS crew members often cross their arms?

It's about as standard procedure as crossing your legs when you're sitting. Arms in microgravity, without conscious effort to keep them by your body, will tend to extend the elbows to the sides - ...
SF.'s user avatar
  • 55k
56 votes
Accepted

Does the ISS have a watch system with at least one person monitoring at all times

It definitely does, and not just one person - except these people are ground-based. The astronaut crew is only a small fraction of the number of people operating, controlling and maintaining ISS. ...
SF.'s user avatar
  • 55k
54 votes

Why do ISS crew members often cross their arms?

Offered as a supplement to @SF's answer: This shows the fully relaxed arm position obtained by a sleeping astronaut. From here
Organic Marble's user avatar
32 votes
Accepted

Are all rockets sent to ISS blessed by a priest?

It's standard procedure in Russia. Here's an article reporting on Scott Kelly's taxi ride to his year-long mission to the ISS in 2015: The barricades to faith fell along with the Berlin Wall and ...
Jerard Puckett's user avatar
25 votes
Accepted

What would the procedure be in the event of a collision warning on the ISS

This kind of situation, while not exactly frequent, has happened on ISS multiple times. With the large amount of debris out there, tracked objects do intersect the ISS orbit from time to time. There ...
Tristan's user avatar
  • 17.3k
21 votes
Accepted

Why are checklists the way they are?

I can answer most of this for the Shuttle. Is there a legend for all of the symbols? Is there a formal grammar? Yes. The document that controls the preparation of the Flight Data File (the formal ...
Organic Marble's user avatar
18 votes

Is there any reason that NASA's launched space probes and MERs usually operate decades longer than expected?

The idea that NASA would intentionally under-represent the lifetimes of those (cherry-picked) missions implies that somehow they knew those lifetimes before launch. Nothing could be farther from the ...
Mark Adler's user avatar
  • 58.2k
17 votes

What are some practices of space exploration that are no longer acceptable?

One prominent example are the original Apollo hatches which opened towards the inside of the capsule and took a minimum of five minutes to open. During a ground training mission, a fire broke out ...
DaGroove's user avatar
  • 1,334
14 votes
Accepted

What happens after a crew finishes putting out a fire?

A spacecraft fire is an extremely serious situation. Even if no serious damage is done to spacecraft systems, the cabin atmosphere is likely to be highly contaminated by toxic combustion products and ...
Organic Marble's user avatar
14 votes

Will the January 2018 government shutdown affect the Falcon Heavy launch?

Currently unclear According to the Verge: It's possible that the [static fire] test could come early next week. But the Falcon Heavy’s launchpad is located at NASA’s Kennedy Space Center, and limited ...
2012rcampion's user avatar
  • 2,549
14 votes
Accepted

How were STS SRBs disassembled

SRB segments for reference while reading this: The boosters were towed back to KSC by ship. This crane then lifted them out of the water... ...and placed them on this dolly which could move them ...
Organic Marble's user avatar
13 votes

Why do ISS crew members often cross their arms?

For many astronauts, it is simply a matter of being considerate to your fellow astronaut who is appearing alongside you. It would not be nice to let your arm drift into contact with the other ...
Digger's user avatar
  • 4,185
13 votes
Accepted

Slide rope way from launch pad of space shuttle?

Yes, I am a source for this information :) Here are some pictures I took of the escape system while standing on the launch pad tower during the STS-124 Terminal Countdown Demonstration Test. The ...
Organic Marble's user avatar
11 votes

What are some practices of space exploration that are no longer acceptable?

The first liquid fueled rocket was constructed by Robert Goddard in 1926. Its design placed the engine at the top and the fuel at the bottom. He thought that this would provide natural stability but ...
Alex Hajnal's user avatar
  • 1,981
11 votes

What are some practices of space exploration that are no longer acceptable?

Not wearing pressure suits during critical phases of flight (eg. ascent or reentry) would not be accepted today (as a lesson learned from Soyuz 11).
filo's user avatar
  • 1,442
10 votes

Will the January 2018 government shutdown affect the Falcon Heavy launch?

Yes, some testing and all launches except for those critical to national security have to be postponed. By now, I’m sure you are well aware that a budget agreement was not reached last night ...
Hobbes's user avatar
  • 128k
9 votes

Are all rockets sent to ISS blessed by a priest?

For the first time it was in 1994, when Mir commander Alexander Viktorenko asked a priest to bless his rocket before launch See https://meduza.io/cards/zachem-osvyaschayut-rakety (in Russian, use ...
Pavel Bernshtam's user avatar
8 votes

How much of the printed materials (manuals, instructions etc.) were allocated for the crew's use in Space Shuttles?

In the mid-1990s, I was part of a team that deployed Hyperman to all the FCRs, POCs and on the shuttle laptops. MOD called the project EDP. The goal was to reduce the 400-800 lbs of paper being ...
JohnP's user avatar
  • 1,527
8 votes
Accepted

First actions taken after identifying a potentially catastrophic decompression?

The major difference between the response to a cabin leak in the shuttle and station is that, if the leak cannot be stopped, the shuttle would terminate its mission and enter, and the station (or ...
Organic Marble's user avatar
7 votes

What were the space shuttle’s emergency procedures for an SRB or ET separation failure?

Referencing the Ascent Checklist Ascent Cue Card: There were no procedures for failed SRB separation, and nothing the crew or ground could do about it. 1 The ET separation sequence2 could be halted ...
Organic Marble's user avatar
6 votes

What are some practices of space exploration that are no longer acceptable?

Approval of a manned system that does not offer a launch abort options through out launch profile. The space shuttle combination of widely spaced solid rockets and a side ways stacked design made for ...
GremlinWranger's user avatar
6 votes
Accepted

What do scientists see when they track space probes?

It's best to read a first-hand and also two second-hand accounts of a real red-light spacecraft emergency. SOHO, the Solar and Heliospheric Observatory was almost lost - more than once! It was - and ...
uhoh's user avatar
  • 149k
6 votes

What are the implications of claiming space heritage if you don't have it?

There are lots of ways that claims are made. When a scientist writes an abstract for a paper, the abstract will generally "make claims" that will hopefully be substantiated later in the ...
phil1008's user avatar
  • 6,108
5 votes

Will the January 2018 government shutdown affect the Falcon Heavy launch?

Yes, it will. SpaceX will be unable to test fire its three-core Falcon Heavy rocket at Kennedy Space Center because of the government shutdown, further delaying checkout operations ahead of the ...
PearsonArtPhoto's user avatar
  • 121k
5 votes

Why do ISS crew members often cross their arms?

There is no special procedure there - just microgravity. Note that the one on the left looks like a normal relaxed pose, with his arms dropped down as they would be on Earth. The other two do look a ...
Quentin Clarkson's user avatar
5 votes
Accepted

How much of the printed materials (manuals, instructions etc.) were allocated for the crew's use in Space Shuttles?

Here is a list of the Flight Data File (FDF) flown on shuttle mission STS-102, a logistics/crew rotation flight to the proto-ISS. If "Copies Flown" has a number in parenthesis, that is the ...
Organic Marble's user avatar
5 votes

Do standard procedures for securing the ISS before an orbital boost burn include making sure that at least large objects are securely "strapped down"?

Yes, there are several ISS Flight Rules and Payload Regulations requiring certain configurations during a reboost or other dynamic events. Racks utilizing PaRIS (Passive Rack Isolation System) must ...
Doresoom's user avatar
  • 1,754
4 votes

First actions taken after identifying a potentially catastrophic decompression?

This is not a comprehensive answer as such, but rather an attempt to put information from @OrganicMarble answer and also information from this unofficial Russian webpage into consize "laymen's terms", ...
Sergiy Lenzion's user avatar
4 votes
Accepted

Procedures if there was a shuttle decompression in the vacuum of space

Yes. The procedures can be found in the Orbit Pocket Checklist, page 4-3. The title is O2 (N2) FLOW HIGH / CAB P LOW / dP/dT. Since your question only asks whether it exists / has been published, I ...
Organic Marble's user avatar
4 votes

Do standard procedures for securing the ISS before an orbital boost burn include making sure that at least large objects are securely "strapped down"?

At least when the reboosts were done using the shuttle, there was no procedural call out to secure anything. This answer steps through the procedures and includes links to the full text of both ...
Organic Marble's user avatar

Only top scored, non community-wiki answers of a minimum length are eligible