Questions tagged [geophysics]

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How were Mars' zero elevation datum defined? What are their shapes?

Discussions on Boiling ponds and pools on Mars? led me to Wikipedia's Mars; Geography and naming of surface features which says: Because Mars has no oceans and hence no "sea level", a zero-...
3
votes
1answer
837 views

How are the coefficients in the EGM96 model normalized?

For my own interest I'm trying to implement the EGM96 gravitational model. I found the coefficients here. The readme file says that they are "fully normalized", but I'm not 100% sure what this means. ...
8
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2answers
2k views

Can we make a space blimp?

OK. Hear me out. I know that blimps float because of the buoyancy of air, and there is no air in space. But think of the way a boat floats on the top of water even though the material that the boat is ...
11
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1answer
155 views

Mission concepts for a tomography of an asteroid or other celestial body

Tomographies of various kinds are basically the only possibility right now to look deeper into asteroids or planets. On Earth, "signals" generated by earthquakes are for instance used for performing a ...