Earth science

is made up of the sun being the center and everything that orbits around it including planets, moons, asteriods, etc.

Gravitationally-bound systems of stars,

stellar remnants, interstellar gas, and

dark matter.

One of the billion galaxies in the observable universe.

region of space visible to us from earth.

Proposed by a French mathematician and physicist Rene Descartes. According to his model, the solar system was formed into bodies with nearly circular orbits because of a whirl-pool motion in the pre-solar materials.

George Louis Leclerc Buffon, French naturalist in the 18th century,

proposed that the planets were formed by the collision of the sun with a giant comet. The resulting debris formed into planets that rotate in the same direction as they revolved around the sun.

Proposed by James Hopwood Jeans and Harold Jeffrey.

Planets were formed form the substance that was torn out from the sun. As a speeding massive star passed near the Sun, it pulled off materials due to gravitational attraction.

In these models, a star or comet passed by the sun to draw out a stream of solar gas that condensed to form planets.

Immanuel Kant and Pierre Simon Laplace proposed the nebular theory. They proposed that a great cloud of gas and dust called nebula collapse because of gravitational pull.

• An enormous cloud of dust and gases

• Mostly hydrogen and helium