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Match the terms to their definitions.
A group of objects that orbit a star.
A rock that has entered Earth's atmosphere, leaving a streak of light in the night sky.
Jupiter, Saturn, Uranus, Neptune. Gas giants.
A force of attraction that keeps planets orbiting the sun.
The orbit of a planet around the sun. On Earth, one year.
The spinning of a planet on its axis, causing day and night.
Huge clusters of stars, gas, and dust bound by the force of gravity.
The idea of that the Earth and planets orbit the sun. A sun-centered view.
Mercury, Venus, Earth, Mars. Terrestrial, rocky.
The theory the universe came forth from a single spot in an enormous explosion.
1.
Big Bang
2.
Doppler Effect
3.
Nebula
4.
Solar System
5.
Geocentric theory
6.
Heliocentric theory
7.
Gravity
8.
Galaxy
9.
Rotation
10.
Revolution
11.
Inner planets
12.
Outer planets
13.
Meteor
14.
Meteorite
15.
Meteoroid