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It was from a giant cloud of gas and dust, called a nebula that collapsed forming our solar system. Slowly, gravity began to pull the solar nebula together, which began to spin faster and faster until it flattened into a disk. Gravity pulled most of the gas into the center of the disk, where nuclear fusion began. This created our sun.

Meanwhile, in outer parts of the disk, gas and dust particles collided and stuck together. Eventually the bigger pieces planetesimals, combined to form our eight planets. Planets that stuck together in the inner solar system were small terrestrial planets (rocky). Planets that stuck together in the outer solar system were large gas and ice giants.

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Related Questions

What type of stars form planets?

None Stars are gas Planets are solid


What caused the dust cloud to form individual planets over time?

Gas


Can condense and become concentrated enough to form a star and possibly planets?

A nebula is a large cloud of gas and dust in space. As gravity pulls the particles in a nebula closer together, it can cause the material to condense and become concentrated enough to form a star and, eventually, planets.


Why are the inner planets different to the outer planets?

The inner planets are all considered rocky planets in that under atmospheric layers, they have a rocky surface. The outer planets are made of gas and liquid, and are called gas giants. They have no solid surface. Also, all the outer planets have rings while the inner planets do not.


Why can't gas leave the gas planets?

The gas of the gas planets is kept in place by gravity.


Are the gas planets bigger or smaller than the rocky planets?

the gas planets are bigger than the rocky planets


Can gas planets have craters?

No. Gas planets do not have solid surfaces.


Which planets are terrstrial which planets are gas planets?

Terrestrial:Mars Gas: Saturn, Jupiter, Uranus and Neptune


Why did earth start?

Rings of gas and dust orbiting stars may condense to form young planets or another term planetesimals. After this, it attracts more matter and increase in size to form planets. This is the basic steps of how planets was formed Dark matter ---->galaxy-------> star--------> planets


What set of planets have more moons terrestrial or gas?

gas planets


Why do outer planets have gas?

because the outer planets are made of gas.


Collided to form planets?

Dust and gas particles in a protoplanetary disk collided and stuck together to form planetesimals, which then collided and accreted to form planets. The process of gravitational attraction and collisions led to the formation of larger bodies within the disk, eventually forming planets.