Across
- 5. this is the smallest type of star
- 6. smaller pieces broken off of astroids or comets
- 8. this is the largest planet in the solar system
- 10. meteors become this when they make contact with the earth surface
- 11. Jupiter, Saturn, Uranus, and Neptune are these planets
- 12. it takes the earth 365.25 days to complete this type of motion
- 14. this space material is large enough to be a planet and is believed to be remnants of the early solar system
- 15. the launching of this satellite started the Space race between the US and USSR
- 16. during the spring and fall seasons the earths axis is not tilted to or away from the sun resulting in a _______.
- 17. a _____ is a glowing ball of hydrogen and helium gas
Down
- 1. this theory, derived by early scientist, states that the sun is in the center of the solar system
- 2. this is the largest type of star
- 3. this space material is made of rock and ice and revolve around the sun in a narrow ellipse
- 4. HR diagrams conclude that a stars ______ indicates what temperature it is
- 6. meteoroids become this when they enter the atmosphere of earth
- 7. this is the hottest planet in the solar system
- 9. it takes the earth 24 hours to complete this type of motion
- 13. Mercury, Venus, Earth, and Mars are these planets