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24 votes
Accepted

Did the Perseverance and Curiosity skycranes land gently, or did they crash?

It crashed and the aftermath was photographed. https://www.space.com/mars-perseverance-rover-photo-sky-crane-crash A moment of respect for the descent stage. Within two minutes of safely delivering ...
Organic Marble's user avatar
14 votes
Accepted

Why would the Apollo Lunar Module pressure dump (to space?) valve have a bacterial filter?

It's one of several factors to prevent Earth microorganisms from contaminating the moon. The Apollo Program Summary Report states 8.5.2.1 Lunar-surface contamination.- Nations involved in the ...
DrSheldon's user avatar
  • 48k
10 votes
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Life on Mars: How do we know it is not from Earth?

One tool in the astrobiology toolbox is chirality, the property that many chemical compounds exist as "left-handed" and "right-handed" mirror images. These have the exact same ...
SE - stop firing the good guys's user avatar
6 votes
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Legality of nuclear debris field on the Moon?

Principle 9 of the UN's Principles Relevant to the Use of Nuclear Power Sources In Outer Space says that whoever caused the debris field to happen must pay to clean up the mess.
Camille Goudeseune's user avatar
6 votes
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How are electrical connectors on the ISS protected from humidity and contaminants?

I searched for "specifications for space station connectors" and found this document "Space Station Approved Electrical,Electronic, and Electromechanical Parts List." It lists a bunch of connector ...
Organic Marble's user avatar
5 votes

Do you have to build your own satellite in sterile conditions?

No, sterile conditions aren't necessary for most spacecraft. Satellites are usually built in a cleanroom to prevent dust and dirt getting in and causing problems like electrical shorts, dirt in moving ...
Hobbes's user avatar
  • 128k
4 votes

Were probes of "lunar microbes" taken from the spacecraft?

Biomedical Results of Apollo has an entire chapter devoted to that topic: section IV chapter 2, pp 425-434. There is much detail, but in summary: Fifteen species of animals, in five phyla, were ...
DrSheldon's user avatar
  • 48k
2 votes

What Mars science research would be impeded by the presence of humans on Mars surface?

There is some merit in waiting. But a considerable time has already been spent and many missions have been conducted already. The danger is that the ever smaller chance of discovering life will ...
Slarty's user avatar
  • 9,690
2 votes

Legality of nuclear debris field on the Moon?

The lunar surface gets quite cold during the two week long night, and while passive radioisotope thermal generators would come in handy for various lunar missions in several ways, they pose a ...
uhoh's user avatar
  • 149k
2 votes

Life on Mars: How do we know it is not from Earth?

One key aspect not mentioned so far is the possibility of contamination of Mars with Earth life that is not due to a failure of planetary protection. Carl Sagan was one of the first to suggest the ...
Vince 49's user avatar
  • 2,621
2 votes

Life on Mars: How do we know it is not from Earth?

First of all, some effort is made to prevent contamination by earth organisms for precisely this reason, but it is not perfect. But, if scientists do detect life it will probably be possible to tell ...
Mark Foskey's user avatar
  • 11.3k
2 votes

Sending trash into space

What would be the positive and negative affects of using other planets and/or space itself for storing trash - instead of wasting place for that on Earth? I'll focus on the positive since others have ...
Brooks Nelson's user avatar

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