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Solar System Crossword

Across
Explored Mars in 1971
Comet that appears in Earth's sky every 76 years
Theory of the origin of our solar system in which planets were formed from a rotating disk of dust and gasses
Mercury, Venus, Earth, Mars
Encircled by winds exceeding 1000 kilometers
Planet on which scientists found water recently
Jupiter, Saturn, Uranus, Neptune
The most prominent feature of Saturn
Space rover that roved the surface of Mars
Rotates on its side
Down
Planet closest to the sun
Known as "earth's twin"
Colliding matter from irregularly shaped bodies colliding
A telescope that travels through space
Flying mountains
The glowing head of the frozen gases traveling through the solar syatem
Shooting stars
Has a mass of 2 1/2 times greater than all other planets
Cloud of dust and gas in space
Current science states that it is not a planet in our solar system
A moon of Neptune
Rocky and metallic materials held together by frozen gasses