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Questions tagged [safety]

Questions regarding space exploration safety issues and procedures.

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Does the SpaceX spacesuit address any of the criticisms of ACES raised by Columbia Crew Survival Investigation Report?

A brief history of what Shuttle crews wore for ascent and entry, from the Columbia Crew Survival Investigation Report: The shuttle was originally designed to be operated in a shirtsleeve (bare-hands) ...
Whizzo's user avatar
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12 votes
0 answers
244 views

Does Crew Dragon have a quick-release hatch?

After today's Crew Dragon launch was scrubbed, it took the pad ninjas at least ten minutes to open the hatch. One of the major criticisms of the Apollo Block 1 hatch design after the Apollo 1 fire ...
Mark's user avatar
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8 votes
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751 views

ISS - Tiangong 2 minimum safe distance

Using the SGP4 propagator, I calculated the minimum distance between ISS and Tiangong-2 for this year. I obtained 12.32 km for 2017-09-27 17:29:36.376 UTC (which ...
Cristiano's user avatar
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7 votes
0 answers
196 views

Is the ISS in danger of the outer radiation belt?

Is the ISS in danger of the outer radiation belt? I know that the ISS is in the low earth orbit and that it briefly passes through the base of the outer RB, but it is actually in danger? How does the ...
Lysandros Bafaloukos's user avatar
5 votes
0 answers
81 views

Will the next deorbiting reactor be on a "safe disposal" trajectory, or re-enter as an uncontrolled derelict?

Kosmos 954 was a reconnaissance satellite launched by the Soviet Union in 1977, powered by a nuclear reactor containing 50Kg of highly enriched uranium-235 Soviet officials … lost control over the ...
Woody's user avatar
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5 votes
0 answers
288 views

Did the EU successfully ban hydrazine? What about French Guiana?

Hobbes' answer to Is the EU really banning “toxic propellants” in 2020? How is that going to work? includes Yes, the EU is aiming to end the use of hydrazine by ~2020. This has been in motion since ...
uhoh's user avatar
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5 votes
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191 views

"Prolonged exposure to microgravity ... makes facial hair flammable"?

TheWeek recently published an article titled "The Colonization of Space", which contained the following sentence (emphasis added): Prolonged exposure to microgravity weakens bones, atrophies ...
Daniel Griscom's user avatar
4 votes
0 answers
106 views

What do they call “all the provisions provided during the launch campaign or atmospheric re-entry of a spacecraft“ in the context of astronautics?

I am reading an entry in a French dictionary and translating it into English. This entry is “sauvegarde.” In a general context, this term is translated as “safeguard,” “protection,” or even “...
Micheal Gignac's user avatar
4 votes
0 answers
96 views

Why is ~280 km one month before reentry the lowest altitude that the final ISS crew may see? Isn't that cutting it kinda close?

Writing this answer to When will the ISS deorbit? I came across Space Policy Online's NASA Solidifies Planning to Deorbit ISS in 2031 and the image below. It shows the estimated last crew occupying ...
uhoh's user avatar
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3 votes
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298 views

Aerosol products in space

I am assuming aerosol products are not used inside the living environment of a spacecraft while it is microgravity. Is that correct, or are there examples of such products being used while an ...
Bob516's user avatar
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3 votes
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What is the minimal distance of clearance in the direction of flight path for a rocket?

Usually the rocket launch sites are placed on a coast or a place where there's basically no civilian buildings in the direction of flight path. Is there a standard/regulation on the minimal ...
Sam's user avatar
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3 votes
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How are the liquid propellant umbilical cord protected from the exhaust?

The launch pad umbilical cords supply propellant to the rocket, and will definitely have some remaining at the time of liftoff. I remember the Saturn V footage wherein a heavy protection door slams ...
karthikeyan's user avatar
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3 votes
0 answers
173 views

Does a safety team get fined if a rocket launch fails due to the safety of the rocket?

I was writing a story and I wanted to write about this topic but I could not find a straight answer from any website. Please help
Anneke HARDIE's user avatar
2 votes
0 answers
143 views

How much force is required to expedite reentry of space debris?

I'm trying to understand how much a small reduction in orbital velocity can affect the orbital decay rate of space debris. I understand that there are multiple factors to consider, such as debris in ...
SafeFastExpressive's user avatar
2 votes
0 answers
218 views

Apparent close encounter of Inspiration4: Is the airspace cleared for returning spacecraft?

In the recording of the SpaceX live-stream covering the return of the Inspiration4 crew one can see an aircraft cross path with the capsule at 22:59:58. This image is a frame grab of the scene seen ...
Peter - Reinstate Monica's user avatar
2 votes
0 answers
176 views

Why did Blue Origin make 5 times more flight tests than Virgin Galactic before sending their founders (Jeff Bezos for BO, R. Branson for VG) to space?

https://twitter.com/blueorigin/status/1413521631717122059 (mirror): Why did Blue Origin make 5 times more flight tests than Virgin Galactic before sending their founders (Jeff Bezos for BO, Richard ...
Franck Dernoncourt's user avatar
2 votes
0 answers
66 views

What kind of impact tests to large touch screen displays in crew capsules have to pass?

Some of the glass layers in commercial large format displays are between 0.25 and 0.7 mm thick. (e.g. 1, 2) If something comes loose in a capsule during a high acceleration period (launch, reentry) ...
uhoh's user avatar
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2 votes
0 answers
189 views

How often are fewer than three astronauts present when moving a Soyuz spacecraft from one docking port to another?

CNN's Astronauts relocated a spacecraft outside the International Space Station (was it inside before?) says: Russian cosmonauts Sergey Ryzhikov and Sergey Kud-Sverchkov, along with NASA astronaut ...
uhoh's user avatar
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2 votes
0 answers
63 views

Propulsion thrust vs high winds?

While I do understand that high wind speed is a risk for space launches (and all air flights), still, is it a physical constraint or a computational problem given we are not dealing with a hurricane/...
J. Doe's user avatar
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1 vote
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32 views

What is the safety record of launch vehicles per person-distance traveled, over all time?

Sometimes, the safety of various forms of transportation are compared based on the rate of fatalities (or injuries or other unplanned destructive accidents) per person-mile or person-kilometer ...
WBT's user avatar
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1 vote
0 answers
153 views

Do ISS crews have to worry about the ionosphere? Have hazards to EVAs or surface arcing/functional anomalies happened due to ionospheric charing?

Comments below this answer tell us that the International Space Station always remained in Earth's atmosphere. It orbits in the thermosphere and simultaneously the ionosphere. This answer to How do ...
uhoh's user avatar
  • 149k
1 vote
0 answers
68 views

What percentage of the population can pass Virgin Galactic's training sessions for tourists to board a sub-orbital spaceflight?

I read on https://www.cnbc.com/2020/09/26/space-tourism-how-spacex-virgin-galactic-blue-origin-axiom-compete.html (mirror): Additionally, Virgin Galactic has said that passengers will spend three ...
Franck Dernoncourt's user avatar