Looking at that picture of Jupiter, what holds it up. What stops it from falling down. 
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Dark matter of course, you know nothing 
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The fact that its full of Gas might help 
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I “know” I know nothing
This is the reason I got to ask these questions that other people obviously do not know the answer to. 
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Bet NASA do.
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Nice amicable sausage appreciation
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Gravity - the same thing that keeps the Earth in the air.
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How much gravity is there on the moon? one would have had to go there to know that spose
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Good try but not correct, try again.
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Lunar gravity is 1/6 of Earth’s.
Apparently it would take five moons to stretch across the Pacific Ocean and there would still be gaps.
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super glue ?
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Spider Web?
Is it? and apparently it’s only 240,000 miles away from Earth, a little gravity doesn’t go very far does it?
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Down?
Air?
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Yes, as in the picture, from the top down to the bottom. 
Gravity is for folks who don’t like Floating about
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They just drift around up there because there is nowhere else to go.
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Hi
Basically gravity.
The sun has a huge mass and consequently a huge gravitational pull.
It was there first, the planets are just smaller masses which do not have the speed to escape the suns pull but are too big to be pulled in, so they go round and round the sun.
We do exactly the same with satellites we put into space, many thousands of them, we fire them up there into different heights and then turn them and either speed them up or slow them down
These are what is called geostationary orbit, they stay there.
Some satellites are sent up to do a job, they fall back to earth and are burnt up in the atmosphere when that job is done.
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