Questions tagged [mission-anomaly]

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2
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2answers
155 views

Is Perseverance still in Safe Mode?

Messages in The Pod Bay and Space.com's NASA: Mars rover Perseverance in 'safe mode' after launch, but should recover both said that Perseverance was in "Safe Mode". Is it still?
3
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1answer
133 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 ...
6
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1answer
219 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 ...
2
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1answer
102 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 ...
6
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1answer
293 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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50 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 ...
1
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1answer
130 views

Will Ariane 5 ECA have LES for the launch of JWST?

Ariane 5 rocket is contracted to launch JWST. This rocket has approximately one failure out of every fifty launches (excluding minor failure). JWST has already taken many years and it is next ...
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2answers
147 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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0answers
60 views

How was DSCOVR “fixed” so that sufficiently dynamic attitude determination is gotten from star cameras?

The following from Space News indicate that a laser gyroscope failed and that software changes were developed and uploaded to the spacecraft bringing it back on line again recently: Software fix ...
4
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1answer
152 views

Why does New Horizons have ~2 kg of unusable “trapped” hydrazine?

The 2018 arXiv preprint The New Horizons Kuiper Belt Extended Mission by the New Horizons team says in section 6, pp. 21-22: Nevertheless, throughout the 2020s, there is significant potential for ...
2
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1answer
104 views

Are all of these tweeted examples of spaceflight failures US failures?

This verified tweet from MJ Azari Jahromi, ICT Minister of Iran, found in Livescience's Iran satellite launch fails to reach orbit says: Today "Zafar" satellite launch failed. Like many ...
2
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1answer
198 views

Does the Artemis III mission have a backup plan if the astronauts are unable to ascent from the Moon?

For the unlikely scenario where the Artemis III astronauts having landed on the Moon press the ascent button and nothing happens, will NASA have a backup or rescue contingency plan? If so, what ...
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3answers
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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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1answer
147 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 ...
8
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3answers
930 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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2answers
2k views

Why would thermal imaging be used to locate the Chandrayaan-2 lander?

Tweets and news suggest that Chandrayaan-2 lander may have been located, using thermal imaging by the Chandrayaan-2 orbiter. Space.com: India Just Found Its Lost Vikram Lander on the Moon, Still No ...
6
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1answer
687 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 ...