Tagged Questions
1
vote
1answer
58 views
Has martian sunset same spectra than this earthly bluish-violet sunset?
Has martian sunset same spectra than this earthly bluish-violet sunset?
What about sunset on Mercury?
4
votes
0answers
63 views
Atmospheric Circulation
What is the simplest simulatable model giving our rotating earth its 3 circulation cells (Hadley, Ferrel, Polar)?
The model should also show 1 circulation cell if the earth's rotation were stopped (or ...
14
votes
2answers
276 views
How deep is the Great Red Spot?
The Great Red Spot (GRS) is a very persistent storm system that's easily visible through a telescope on the surface of Jupiter. But what is the three-dimensional structure of the GRS, and how deep ...
1
vote
0answers
61 views
What is the critical mass of a planet to have an atmosphere like Earth's?
Small planets/orbits like Moon cannot have atmosphere because of their masses. They don't have enough gravity to hold an atmosphere. Then what is the critical mass that makes enough gravity to keep an ...
4
votes
2answers
296 views
What does the phrase “limb of the earth” or “atmospheric limb” mean?
What does the term limb of the earth (see this question, for example) or atmospheric limb mean? The phrase strikes me as very odd, since earth is nearly spherical. Do other planets with atmospheres ...
0
votes
1answer
308 views
Atmospheric Escape of Gas Molecules
Most of the Bodies and Objects in space are likely to have an atmosphere. Since the space is empty, the gases in atmosphere should have either dissolved or emptied into space. But, Why doesn't this ...
0
votes
2answers
100 views
Atmosphere above huge fire areas (e.g., “fire ocean”)? [closed]
My question is more about climate sciences, but I hope that it is still related to physics.
What would be possible atmospheric conditions for planet with some kind of "fire" ocean?
I had some ...
3
votes
1answer
136 views
Keeping air in a well
Let's say I've got an Earth-like planet with no atmosphere: it's just a barren ball of rock. I want to live there, but I don't like domes, so instead I'm just going to dig a big hole and let gravity ...
1
vote
2answers
439 views
Altering Venus rotational speed to match Earth's via weather manipulation
Venus rotates approximately 6.5 km an hour Earth rotates approximately 1650 km/h how fast could we speed up Venus's rotation via only weather manipulation ( maybe a giant fractal lens between Venus ...
3
votes
1answer
13 views
For the long-term evolution of atmosphere/orbit, when is perihelion more important than mean distance?
When we want to figure out the long-term evolution of a planet's atmosphere/orbit, when is perihelion more important than mean distance?
E.g. some processes (like Jeans Escape and escape of ...
5
votes
3answers
234 views
Why is the surface of Venus so hot?
Whenever I have seen Venus described, its high surface temperature is attributed to an intense greenhouse effect. This seems to make sense, as its atmosphere is roughly 96% CO2. But on Earth, the ...
8
votes
3answers
1k views
What would happen if the polar ice caps of Mars melted?
My dad told me that Mars' polar ice caps are made of H2O and CO2. If they melt, would it add an atmosphere to Mars and allow life?
13
votes
3answers
210 views
Why don't more rocky planets/moons have appreciable atmospheres?
It seems obvious why mercury has no atmosphere, given its proximity to the sun--but yet Venus is also fairly close, and has an extremely dense atmosphere. Titan is a large moon with an atmosphere ...
