Across
- 3. || what is the energy emitted as electromagnetic radiation per second?
- 4. || what star is closest to us? (~4.2 lightyears away)
- 6. || what galaxy is the neighbor of the Milky Way?
- 9. || what is the distance light travels in one year known as?
- 11. || what is the name for the radius of Earth’s orbit around the sun?
- 13. || what type of galaxy is the Milky Way?
- 14. || what type of stars are found in globular clusters?
- 15. || ______ planets are planets that were to small to survive bombardments.
- 16. || what is the most common type of atom in the universe?
Down
- 1. || what is the largest planet in our solar system?
- 2. || what kind of universe do we live in?
- 5. || what is the distance at which one astronomical unit subtends an angle of one arcsecond?
- 7. || what are known as the smallest structures in the universe?
- 8. || what type of stellar association is young and only has several thousand stars inside it?
- 10. || what cluster is our galaxy in?
- 12. || what do clouds of gas and dust form in space?