Questions tagged [mission-anomaly]

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6 votes
1 answer
856 views

What precautions are planned to prevent samples returned from Mars crashing and releasing organisms on Earth?

Bias disclaimer: I think that returning samples from Mars to Earth at a point in time where we also suspect there is a chance that there is microbial life on Mars is ill-advised and arrogant. We are ...
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8 votes
3 answers
2k views

Rocket explosion compared to kT of TNT; has one ever knocked something over at a distance?

The energy equivalent of 1 gram of TNT is about 1 kcal or large Calorie. For reference, 1 gram of carbohydrates gives us almost 4 Calories of energy (if we are lucky enough to use it and not store it)....
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2 votes
1 answer
209 views

Did Corporal or other rockets launched from White Sands land in Mexico? If so, how often?

At 10:39 in the video Explorer One is the following: Pickering had once half-joked that JPL could do anything, but building the corporal proved a humbling ...
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6 votes
1 answer
1k views

Which Voyager spacecraft "mutinied", and what really happened?

The August 2017 BBC News Science in Action podcast The Algae that Changed the Earth includes other topics, including the following: In August and September 1977, Nasa's probes Voyager 2 and Voyager ...
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6 votes
2 answers
354 views

Why is Rocketlab working with a Federal Aviation Administration to investigate an early 2nd stage engine shutdown?

Rocketlab's just-posted Rocket Lab Experiences Anomaly During Launch begins: Auckland, New Zealand. May 16, 2021: Following a successful lift-off, first stage burn, and stage separation, Rocket Lab ...
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26 votes
1 answer
3k views

What skipped test on Genesis would have detected the backwards-inserted accelerometer which didn't deploy the parachute?

What precautions are planned to prevent samples returned from Mars crashing and releasing organisms on Earth? and this answer to Why would bringing samples from Mars back to Earth be a “civilization-...
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18 votes
2 answers
3k views

Was there an anomaly during SN8's ascent which later led to the crash?

In SpaceX'S video, there is a conflagration inside the engine enclosure which seems irregular at around 1:49:49. The engine far left of the engine camera stops working and a few seconds later some ...
12 votes
3 answers
1k views

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

Engadget: DirecTV satellite is at risk of explosion due to battery issues Space News: DirecTV fears explosion risk from satellite with damaged battery say that the spacecraft must move 300 km above ...
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4 votes
0 answers
79 views

What was South Korea's Nuri's dummy payload and where did it end up?

Wikipedia's Nuri (rocket) explains that it is a South Korean, three-stage all indigenously developed launch vehicle, and says: On 21 October 2021, it had its first flight at 08:00 UTC and it launched ...
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7 votes
1 answer
419 views

How could RCA Satcom III have been completely lost? (Or was it?)

This answer to What “missing satellite” was part of the story of CNN's debut? quotes the 1981 UPI Article The RCA Satcom III-R commercial communications satellite, designed to... as follows: The ...
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5 votes
2 answers
430 views

After 21 years of silence how and by whom was OSCAR-7 first identified as functional?

This 2017 comment below an answer to What is the oldest artificial satellite still in use? says: But it should be mentioned that AMSAT-OSCAR 7 was silent between 1981 and 2002 for 21 years. It was ...
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2 votes
0 answers
75 views

How did omission of command to Huygens lander not get caught by anybody at ESA nor anybody at JPL? Procedures in place to avoid in future?

In this answer to Prior to putting spacecraft on a trajectory going a significant fraction of the speed of light, would some things need to be tested on Earth? I wrote: As far as communications is ...
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1 vote
0 answers
87 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 ...
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1 vote
2 answers
225 views

Why were two simultaneous command transmissions interpreted by Kosmos 57 as an order to begin the descent?

This answer to Encryption in radio system points to the Wikipedia article Kosmos 57 which says: The unmanned spacecraft was destroyed on its third orbit around Earth. Two ground control stations, ...
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1 vote
0 answers
85 views

Roughly how high does a rocket have to get before the self-destruct becomes inaudible? Invisible?

Watching the NASA Spaceflight video Astra Test Flight (Launch Vehicle 0006) linked below it seems the launch was terminated, but at least on the video there was no audible Earth-shattering kaboom. ...
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0 votes
1 answer
216 views

Best (or least worst) conditions to "store" an astronaut in a suit for six days?

@GremlinWrangler's answer to How can an Astronaut survive for six days inside a Spacesuit? includes the following: make sure the suit can provide air and water, and adjust the temperature to ...
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