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Solar System Formation

Horizontales
The process at which protons in the center of atoms begins to fuse because of high temperatures.
Sometimes called gas giants. Mostly made of hydrogen and helium.
Rocky object that orbits Earth and whose origins remain a mystery.
Sometimes called rocky or terrestrial planets.
Can be found between the inner and outer planets. Left over from the formation of the Solar System.
Planets beyond our Solar System that orbit other stars.
Giant cloud made of dust that once floated in a spiral arm of the Milky Way.
Verticales
Made of dust and gas. This is the material in the nebula that was not absorbed into the sun.
Created by the collapse of Nebula and categorized as a yellow dwarf.
Grains built up into balls and then objects a mile in diameter by gentle collisions.
Supports astronomers' beliefs that our Solar System formed from by accretion.
The number of planets that swept their orbits clean.