The Sun

2. The absence of matter; empty space
6. a combination of two or more atoms
8. the process of creating electrically charged atoms or molecules
10. a very narrow short-lived jet of gas shooting out from the chromosphere
11. An icy interplanetary body that, when heated by the sun as it enters the inner
12. The outermost layer of the sun's atmosphere
13. the lightest element
16. A mass of gaseous material large enough to trigger nuclear reactions to trigger nuclear reactions in its core
17. A sudden, short-lived burst of energy from the sun that can eject gas at high speeds
18. an old main-sequence star whose surface layers have expanded enormously

1. when the moon covers the whole sun leaving only the corona visible
3. the heating of the planets atmosphere by the absorption of heat radiated from its surface
4. the second lightest element
5. A shape like a flattened circle or oval
6. Any body orbiting around a planet
7. An electrically charged atom or molecule
9. A rocky or metallic interplanetary body
12. The densest inner region of a star,planet, or other object
14. A star smaller than the average size
15. An event when the shadow of one body falls onto another