Gravity and Space

2. A system containing billions of stars.
9. A small, rocky object that heats up when entering Earth's atmosphere.
12. a small, rocky object that orbits the Sun
13. The measurement used for stuff inside the solar system.
15. a ball shaped gas celestial body of great mass that shines by its own light.
17. a piece of stone or metal that travels in space
18. Turning on an axis

1. a celestial body orbiting the sun in an elliptical orbit around a star.
3. all of space and time and their contents including galaxies, stars, planets, and other forms of matter or energy.
4. any fragments from space that survive their trip through the atmosphere and land on Earth.
5. large body of ice and rock that travels around the Sun in an elliptical orbit.
6. A force that pulls rocks and other materials and attracts objects together
7. a star with a group of bodies that revolve around it.
8. One object going around another
10. The amount of matter in an object.
11. The gravitational pull on an object.
14. Years The way scientists measure distances outside our solar system
16. The path of an object that revolves around another object in space.