ES 2.2 The Solar System

4. huge collection of stars
6. a streak of light in Earth’s atmosphere made by a glowing meteoroid
7. the largest object in our solar system
8. to identify the presence of something
10. a meteorite is a meteoroid that strikes a planet or a moon
12. to move around another object
13. means “earthly”
15. the length of a line passing from one side of a circle to the other through the center
16. atoms combining and releasing large amounts of energy (2 words)
17. something in the shape of a ball
18. relating to light or the way we see things

1. the force that every object exerts on all other objects because of their masses
2. to get or be given
3. a small, rocky particle that moves through space
5. a person who travels and works in space
9. a device that lets you see things far away
11. a flight or trip to perform a specific task
14. to place into groups