According to our current knowledge, planets are formed around a new star by condensing in a disc of molecular gas and dust, embedded within a larger molecular cloud. Condensation increases until they become giant planets, which are heated, then cleanse their orbits in the disc and possibly bend it.
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They emerge from the giant, donut-shaped disk of gas and dust that circles young stars. Gravity and other forces cause material within the disk to collide.
The Sun and the planets formed together, 4.6 billion years ago, from a cloud of gas and dust called the solar nebula.
May 10, 2021 · Penn State astronomers test theories about the formation of planetary star systems in a variety of ways, including by studying the spinning ...
Posted: Jul 20, 2018
Our solar system began to form about 4.6 billion years ago. Astronomers think small rocky and icy grains within the solar nebula began sticking together, ...
Mar 29, 2023 · The order of the planets in the solar system, starting nearest the sun and working outward is the following: Mercury, Venus, Earth, Mars, ...
In summary, planets are bodies orbiting a star. Planets form from particles in a disk of gas and dust, colliding and sticking together as they orbit the star.
Stars form from cold interstellar molecular clouds. As they collapse into protostars under the force of gravity, the remaining matter forms a spinning disk.
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