Topic 9 Vocabulary

2. The path the Earth takes around the Sun
4. A pattern or group of stars that people imagine represent a figure, animal, or object
7. getting larger
8. This occurs when the moon moves into the Earth’s shadow
9. a giant ball of superheated gas, or plasma, composed of hydrogen and helium
10. The spinning of Earth on its axis
14. The movement of one object around another
16. an object that orbits a star, has become rounded by its own gravity, and has cleared the area of orbit from any debris
17. A period of time in which day and night are the same length, 12 hours each

1. A period of time when the Sun is the highest in the sky
3. This occurs when the Earth moves into the moon’s shadow
5. An imaginary line that passes from Earth’s North pole to the South pole
6. a streak of light produced when a small piece of rock, or ice, burns as it enters Earth’s atmosphere
11. a body that orbits a planet
12. getting smaller
13. A mixture of dust and ice that develops a long tail as it approaches the sun
15. The force that attracts all objects towards each other