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Solar System Intro

Use to help study for your quiz on Introducing the Solar System

QuestionAnswer
Planet An object that orbits the sun, is round, and has cleared the area of its orbit. (has its own orbit)
Solar System The sun, the planets, their moons, and a variety of small objects.
Planetesimal Small body that combined with like bodies to form all the other objects in our solar system.
Astronomical unit Used to measure distances within the solar system.
Dwarf planet An Object that orbits the sun, is spherical but has not cleared the area of its own objects. (doesn't have its own orbit)
Rotation on its axis One day on a planet.
Revolution around the sun One year on a planet.
Natural Satellite Another name for a moon.
Sun The star in our solar system
When did the solar system form? 4.6 Billion years ago
99.85 % of the solar systems mass is from the sun Mass of the sun
Outer Planets Jupiter, Saturn, Uranus and Neptune. Large planets made of gasses and liquid.
Inner Planets Mercury, Venus, Earth, and Mars. Small and made of rock and metal.
How was the solar system formed? A spinning disk of gas was pulled by gravity and forces a sun to form. Planetesimals collided together to make the planets.
What makes up the solar system? Made up of a star, planets, dwarf planets, asteroids, comets, and moons.
Created by: samir.ezzelarb
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