Questions regarding a layer of gasses surrounding a celestial object.

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4
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0answers
49 views

Is it accurate to compare comets to clouds and rain?

I'm trying to avoid an opinion-based question, so before I outline the comparison I'm proposing, I will qualify the specific facts that yield this comparison. By focusing answers on the relative ...
2
votes
0answers
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Could spy satellites use laser guide stars (for adaptive optics)?

Ground based observatories use sodium laser guiding stars to measure scattering up to the sodium layer at 90 km altitude. So I suppose that an Earth observing satellite would need some other ...
2
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0answers
44 views

How can you determine the initial volume of a planet's atmosphere?

Since the surface pressure of a planet is determined by the mass of the column of gasses above it one would surmise that to determine the pressure you must know the volume and mass of the atmosphere. ...