Space Review

3. Another name for a shooting star
4. An object that travels around a planet or a dwarf planet
5. The name of the first gas planet after the asteroid belt
7. The process through which the Sun generates heat and light
9. Astronauts in space lose about ____ percent of their bone mass each month they are in space
12. What separates the inner and outer solar system
13. Gases and charged particles expelled above an active sunspot
16. The name of our Galaxy
18. What a small to medium size star will become when it runs out of fuel

1. The term used to describe the longest or shortest days of the year
2. Large chunks of ice, dust and rock that orbit the sun
3. Piece of rock or metal in the solar system smaller than an asteroid
4. A big star that explodes might form a ______________
6. that the Universe began in an incredibly hot, dense expansion about 13.7 billion years ago
8. ___________ can cause astronauts to experience bone loss, stroke symptoms and changes in blood cell shape
10. What a star becomes after it is a Red Giant
11. A star begins as a __________
14. The unit used to measure distances beyond our Solar System
15. The planet between Venus and Mars
17. The Northen Hemisphere is point _______ from the Sun during the winter