why are the terrestial planets made of rock and metal instead of gas?

Answer 1

Has nothing to do with the Big Bang theory.

These planets formed in much the same way as the gas giants, but since they were closer to the sun, most of the light gases were blown away by the early solar wind. If you stripped away the thick atmospheres of the Jovian planets, you would probably find a rocky, metallic core underneath. At least that's what the current models indicate.

So our planet is most likely the core of what would have been a gas giant if it had been farther from the sun.

Answer 2

While Brant and john are correct, I might add that gas giants are thought to form quickly in the condensing nebulae before the protosun ignites. Because of this, they were able to build up a substantial gravity field which would have been able to retain the gasses blown outwards from the solar wind blast.

Gas giants form more quickly because of the temperature of space further from the Sun. Ice is able to combine with the dust and rock in the outer planets whereas ice would be in the form of liquid and gas in the inner planets.

It is gravitational pressures that then prevent the gas planets from forming solid cores. Similar elements exist in their cores as the terrestrial planets, but in liquid or gas states instead of solid due to these gravitational pressures.

Answer 3

It's all a matter of mass. Rock and gas have far different weight and mass. The dust cloud that coalesced and formed our solar system had a strong central gravitational field which collapsed and formed the sun. What was left formed the planets. The rocky planets being heavier or and more mass settled into orbits closer in.

Answer 4

The sun is pretty hot, and at the time of it's formation may have been far hotter for a short time. All this heat boils off any gases in the inner solar system, and the solar wind then pushes the gas into the outer reaches of the solar system, where it is cool enough for the gases to condense into various ices.

Due to this process the inner solar system ends up being mostly rock and metal, and the outer solar system get enriched in gases and ices.

Answer 5

Terrestrial planets are closer to the Sun, so their lighter elements like hydrogen and helium were first of all stripped away by the solar wind, and secondly, the remaining lighter gases actually "flew" away from the relatively low gravity of the terrestrial planets. (keep in mind that Earth has a significant amount of gas, it is just heavier, such as Nitrogen, argon, fluorine, and oxygen. Venus, on the other hand, has an abundance of carbon dioxide.

Answer 6

thats just the way it is

big bang theory

questions with ambiguous
answers

but the last planets r made of gases..like staurn will float on water

idk