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Results tagged with planetary-science
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user 49
The study of planets, asteroids, comets, etc, including weather, geology, composition, etc. This tag should be used when the focus of the question is on the the science of a non-Earth non-star natural object, and not used when designing spacecraft to cope with said challenges.
22
votes
Accepted
Why is the Far Side of the Moon so different from the Near Side?
The shielding of the near side of the Moon by the Earth is in all reality quite insignificant, with merely 0.01% of the Moon's sky obstructed by the Earth. If we look at this animation of the speed of …
- 76.4k
9
votes
What causes the cracks on Europa to form?
Disclaimer: I'm going to attempt answering this question mostly out of my head due to lack of time, but will later equip it with references and correct my assumptions, if anything goes wrong...
Eve …
- 76.4k
21
votes
Why is the rotation rate of Venus so slow?
Nobody really knows for sure. And there's two, nay three more odd things about it's rotation on its own axis, namely:
It is the only planet in the Solar system that rotates retrograde, i.e. clockwis …
- 76.4k
5
votes
What is responsible for the different colors of Iapetus?
Well, it's the sugarcoating blowing off the Saturn's doughnut, of course!
Not far from the truth, but jokes aside still, the color dichotomy of Iapetus is due to the darker half, the Cassini Regio, b …
- 76.4k
19
votes
Accepted
What are the dark areas on the moon?
The dark and large areas are solidified lava beds from earlier periods of Lunar evolution, when it was still volcanically active. Notice that they might be somewhat less covered by still visible impac …
- 76.4k
4
votes
Can a planet or other large body be a superconductor?
Yes, and that's believed to be the source of Jupiter's gigantic magnetosphere. It is also a possible explanation for bizarre cooling of Cassiopeia A. So that's at least two immediate effects of large …
- 76.4k
9
votes
Can it be said that Venus is covered by an ocean rather than atmosphere?
Venusian lower atmosphere qualifies as a supercritical fluid, but there isn't any clear liquid-gas interface (a surface layer) where Venusian ocean and its atmosphere would come in contact with each o …
- 76.4k
18
votes
Accepted
How can Mars have dust storms with such a thin atmosphere?
Mostly a product of two environmental factors, I would wager:
Lack of in-air humidity or liquid water on the ground keeping dust fine grained and not sticking together to form larger mass particles, …
- 76.4k
13
votes
A cloud-top colony on Venus, will it drift to the poles?
There's a lot to be said about circulation of Venusian troposphere first, but that's all nicely explained on Wikipedia. But please read it as background, if that's required; For easier reference thoug …
- 76.4k
18
votes
Accepted
Is there a map or list of all the lava tube skylights the LRO has detected on the Moon?
There is a map of lunar pits, created by R. V. Wagner and M. S. Robinson of the School of Earth and Space Exploration, Arizona State University, in 2014. From Distribution, Age, and Formation Mechanis …
- 76.4k
3
votes
Accepted
Is Hydra of Pluto cut unusually, or just darkened on its surface?
According to New Horizons team, it is most likely a bilobed body produced by a slow collision of two older moons, and is somewhat similar in shape to comet 67P/Churyumov-Gerasimenko. Here's an enhance …
- 76.4k
11
votes
Accepted
Does Venus have doldrums or horse latitudes (latitudes with lower winds)?
There are no horse latitudes on Venus, only equatorial doldrums and polar fronts / collars. Convection driven Hadley cells on Venus stretch to ±60° in latitude from the intertropical convergence zo …
- 76.4k
5
votes
Accepted
How to produce oxygen out of Venusian atmosphere's carbon dioxide?
Some of your options are:
Electrolysis of the atmosphere (see e.g. how MOXIE will do it on Mars), for which you will need a source of electricity, a catalyst (e.g. zirconia), and which produces carb …
- 76.4k
13
votes
Accepted
Can you have a rainbow on any bodies in the solar system besides Earth?
There is a possibility of rainbows appearing naturally on other celestial bodies that have sufficient water vapor or a large number of water droplets in their atmospheres, or indeed gases or droplets …
- 76.4k
8
votes
Accepted
Could Jupiter's tidal forces be used to generate energy?
We don't really know how the tidal energy that Europa gets from its orbit around Jupiter translates exactly to its surface or subsurface activity, so it would be hard to speculate on any possible powe …
- 76.4k