45 votes

What are the most serious injuries that astronauts have suffered while in orbit?

The Mars Society has a good indication of what the most serious medical issues have been in space flight. These include: A number of cases where the gloves leaked in an EVA. (STS-37, Mir Space ...
PearsonArtPhoto's user avatar
  • 121k
25 votes

Why is the Falcon Heavy first launch being given such a risk of failure?

The question misinterprets the comments of Elon Musk, who is trying to set expectations appropriately. That is, this is a new vehicle, and there are issues that are next to impossible to model on ...
geoffc's user avatar
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25 votes
Accepted

What are the most serious injuries that astronauts have suffered while in orbit?

The crew of Apollo 7 were all ill. The commander, Wally Schirra, developed a cold and the other two crew members suffered prolonged motion sickness. Due to the illnesses, the crew failed to perform ...
dotancohen's user avatar
  • 6,754
19 votes

What are the most serious injuries that astronauts have suffered while in orbit?

While I'm not sure it would qualify as a physical, bleeding injury, there was a near-death from drowning in space. Luca Parmitano, was an Italian NASA astronaut who nearly drowned during an EVA in ...
Kevin Peter's user avatar
16 votes

What are the most serious injuries that astronauts have suffered while in orbit?

Some crewmembers have been incapacitated by Space Adaptation Syndrome (SAS) as they adapt to the free fall environment. The most publicized case of this was "Payload Specialist" Jake Garn who was so ...
Organic Marble's user avatar
13 votes

Is the risk of explosion-induced damage to operational spacecraft in GEO actually reduced substantially by raising Spaceway-1 by 300 km?

Apparently the battery is only prone to explode while used. So when turning the satellite off, the risk appears to be mitigated sufficiently (I expect the battery to be discharged. A battery storing ...
Infrisios's user avatar
  • 894
13 votes

What are the most serious injuries that astronauts have suffered while in orbit?

It is well known that finger injuries sustained during EVA plagued a lot of astronauts. The Lunar Surface Journal for Apollo 15 has some good references to this at 126:08:40, with links to post-...
JDT's user avatar
  • 583
12 votes

What are the most serious injuries that astronauts have suffered while in orbit?

A relatively large number of US astronauts who performed EVAs have injured their shoulders badly enough to require surgery. At the time this study was performed (2012) there was no definite ...
Organic Marble's user avatar
9 votes

What are the most serious injuries that astronauts have suffered while in orbit?

I think the worst injuries sustained have been the deaths of the crew of Soyuz 11. The crew capsule depressurized during preparations for reentry.
Welsh King's user avatar
9 votes

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

Yes, this could cause issues. Normally about 5 people are required full-time for maintenance. They need 6 people to get any science done. So they're going to be looking at contingency plans right now. ...
Hobbes's user avatar
  • 128k
9 votes
Accepted

Is Starman/Roadster in any danger in the asteroid belt?

Is Starman/Roadster in any danger of asteroid belt? Honestly? No. The Asteroid belt does contain lots of asteroids. But this is deep space. These things are not close together in any sense. Think ...
Simba's user avatar
  • 206
7 votes

Demonstrative examples of NASA "programs that go too long, that cost too much... end up getting cast out later"?

The Constellation program is the first that comes to my mind. It was started in 2005 with the ambition of crewed missions to the Moon and Mars. A crewed mission to a near-Earth asteroid was also ...
Ludo's user avatar
  • 14.4k
7 votes

Why is the Falcon Heavy first launch being given such a risk of failure?

Musk himself talked about some of the challenges “One of my biggest concerns is booster-to-booster interaction,” Musk explained. “You’ve got a lot of dynamics going on there. Those rockets are very ...
Machavity's user avatar
  • 7,905
5 votes

Why is the Falcon Heavy first launch being given such a risk of failure?

Every orbital rocket launch comes with a risk of failure; modern, proven rockets are running about a 98%-99% success rate. I imagine that SpaceX is well over 90% confident in the success of this ...
Russell Borogove's user avatar
5 votes

What systems onboard the JWST are redundant and which are not?

Only a partial answer: the Gimbaled Antenna Assembly Step happened and I wondered if there is a second antenna in case this step fails for whatever reason, and if not, what are the criteria applied ...
blobbymcblobby's user avatar
4 votes
Accepted

How do we use Fire Extinguishers to Control Fire in the Space Station?

The ISS, Shuttle, and Mir have all had hand-held fire exinguishers. Mir actually used them. Shuttle also had built-in fire extinguishers in the avionics bays that were discharged remotely. ISS ...
Organic Marble's user avatar
4 votes

Demonstrative examples of NASA "programs that go too long, that cost too much... end up getting cast out later"?

Consider the XS-1 An experimental reusable flyback first stage. Boeing collected several grants to build this vehicle from DARPA. However, in 2020 Boeing announced it was ceasing its role in the ...
Freddo411's user avatar
  • 374
4 votes

Demonstrative examples of NASA "programs that go too long, that cost too much... end up getting cast out later"?

The VentureStar SSTO qualifies. It was intentionally set up to develop risky new technologies such as composite liquid hydrogen propellant tanks and aerospike engines, and get them flying in an ...
Christopher James Huff's user avatar
3 votes

Demonstrative examples of NASA "programs that go too long, that cost too much... end up getting cast out later"?

Given that the quote is coming from Jim Bridenstine just before the 2020 election, note that he, his agency, and the Artemis program is facing potentially very different leadership with very different ...
Freddo411's user avatar
  • 374
3 votes
Accepted

What is a safe speed in space for spacecraft?

Faster travel is generally better: less time for random or wear-down mechanical failures, less exposure to cosmic rays, lower probability of collisions. Direction and relative velocity of collisions ...
Russell Borogove's user avatar
3 votes

Is Starman/Roadster in any danger in the asteroid belt?

As Simba's answer explained, the probability of a spacecraft accidentally colliding with an asteroid is very low. On average, asteroids in the Main Belt are hundreds of thousands of kilometers apart. ...
dez's user avatar
  • 386
3 votes
Accepted

What is the advantage of doing a static test fire before launch?

Test fires have many purposes. The engines themselves were individually fired at the McGregor, TX facility, then shipped back to Hawthorne, CA to be mated to a stage. That entire stage was shipped to ...
geoffc's user avatar
  • 79.5k
2 votes

How risky is launching a rocket during a geomagnetic and solar radiation storm?

Somewhat risky: SpaceX announced on 2022-02-08 that they lost 40 Starlink satellites because a geomagnetic storm increased drag at the orbit altitude (just 210 km just after launch) so much that the ...
Ludo's user avatar
  • 14.4k
2 votes

What will happen to the rocket exhaust particles fired by spacecrafts?

Hopefully someone comes along with a sourced answer, but until then here's one that's just reasoned out: When exhaust first leaves a spacecraft, it's hot and relatively dense. As it gets further ...
Carl Kevinson's user avatar
2 votes

What is a safe speed in space for spacecraft?

Velocity is calculated usually to minimise fuel needed, or sometimes to minimise time - but the time piece is generally about resources/mass, not minimising risk of collisions. "Safe speed" is ...
Rory Alsop's user avatar
  • 13.6k
1 vote

How orbital debris' density affects damage, everything else being equal?

Undoubtedly the steel because it is smaller. Compare how much damage you can do to a piece of wood by hitting it with a mallet compared to putting a nail against it and hitting the nail. That said, ...
Martin Kochanski's user avatar
1 vote

What are the risks of using cheap industrial components for commercial space appliances esp. solution platforms for them?

(Copied from comments, just because it's been some years:) Industrial components are cheaper because they are not designed and tested for a space environment. Testing them for tolerance to radiation, ...
Camille Goudeseune's user avatar
1 vote

What is the probability that a deep space crew is hit by a Solar proton storm?

What is the probability that a deep space mission gets hit by such a Solar proton storm? There's a paper by Riley et al. [2018] (https://doi.org/10.1007/s11214-017-0456-3) that estimates the ...
honeste_vivere's user avatar

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