your understanding of gravity is really limited.
Everyone's understanding of gravity is limited. As stated, there remain many mysteries. But since you're apparently the expert on the secrets of the universe, feel free to enlighten me.
Also, Saturn is made of gas. Welcome to 2nd grade.
Actually, the current model of the "Jovian"-type (gaseous) planets suggests there is a solid core within these worlds. Furthermore, due to enormous pressures within Jupiter and Saturn, it is believed that hydrogen undergoes a phase change and becomes metallic, making it solid (or at least semi-solid), rather than a gas.
Regardless, I reject that model. Jupiter, I believe, has a defined atmosphere approximately 15,000 miles thick. Below this lies a semi-solid surface of metallic hydrogen, a layer which is several hundred miles thick. After that, there is a gap (hollow) between the metallic layer and the solid core.
These planets must have a solid core. It is the only feasible explanation for these planets' strong magnetic fields.
It is also a well-known fact that Jupiter, Saturn, and I believe Uranus and Neptune as well, put out more energy than they absorb from the sun. This is because they possess active cores - most likely a naturally-occurring fission, which has been observed even here on Earth.
[ame]http://en.wikipedia.org/wiki/Natural_nuclear_fission_reactor[/ame]
Furthermore, an oddity at the north pole of Saturn has been observed:
http://tinyurl.com/27j5u5
An entrance into the interior? Quite possibly.
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