Across
- 3. space and all the matter and energy in it
- 5. matter that does not give off electromagnetic radiation but is quite abundant in the universe
- 9. The study of the moon, stars, and other objects in space
- 12. an object in space whos gravity is so strong not even light can escape it
- 13. Sun, planets, and all the other objects that revolve around the sun
- 14. A fixed luminous point in the night sky that is a large, remote incandescent body like the sun
Down
- 1. The distance light travels in one year
- 2. A system of objects, such as a galaxy that is held together by gravity
- 4. A mixture of gases that surrounds a planet or moon
- 6. The name given to the first four outer planets :Jupiter, Saturn, Uranus, and Neptune
- 7. environments given production and unstable growths
- 8. A celestial body resembling a small planet but lacking certain technical criteria that are require for it to be classed as such.
- 10. A large spiral galaxy that is home to earth and the rest of our solar system, and about a trillion stars
- 11. no definite shape or volume