# Tag Info

## Hot answers tagged gas-giants

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### Why does the Sun have different day lengths, but not the gas giants?

It's a matter of how "day" is defined. Wikipedia's article on Jupiter cites this IAU/IAG paper for the length of a Jupiter day. In it, footnote (e) of table I has the following: The equations for ...
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### Why can't stars be multicolored like gas giants?

Just rotation is the wrong tree to bark up on. You see color variations on gas giants due to differences in composition, i.e. ammonia vs. sulfuric acid clouds on Jupiter, which are transported ...
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### Where do we define the "surface" of a gas planet?

There are two common definitions in use for the surface of gas planets: The 1-bar surface: As pressure increases, the deeper in we go into the gas planet, we will hit a pressure of 1 bar at some ...
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### Fate of Jupiter when our sun dies

How will the atmosphere deal with the extreme heat? Using this article as a guide During most of the red giant lifetime, the sun will be only 30 times brighter than its current state. Toward the ...
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### Why does each and every planet of our solar system have an unique axial tilt angle?

You could also ask: Why is each planet a different size. or Why is each planet a different colour. or even Why are the apples in my fruit bowl pointing in different directions. The reason ...
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### Can a dying, swelling, star be rejuvinated by enveloping orbiting gas giants?

Stars turn into Red Giants not because they're running out of fuel, but because they're accumulating material they can't use for fusion (yet) in the core. The star isn't so much dying of starvation as ...
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### What's the critical mass of a rocky planet before its gravity traps enough gas in its atmosphere to start becoming a gassy planet

In most planet formation theories, the boundary is around 10 Earth masses - the build up of the core mass before that is relatively slow, but once it crosses that threshold, the planet gains mass ...
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### Why do the solar system planets go rock-gas-ice instead of rock-ice-gas when moving away from the sun?

Prelude It is now generally accepted in the planet formation community that planets form as a side-product of the star formation process in so-called protoplanetary discs. Protoplanetary discs have ...
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### Planetary gas giants

Short answer: 1) Yes and no; 2) Yes, there is a supercritical fluid, of hydrogen. Long answer: It's fairly hot deep down in Jupiter; estimates range from 10,000 K to 24,000 K. You would think that ...
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