Astronomy

5. A temporary dark blemish on the surface of the Sun
7. great clouds of glowing gas, lit up by stars inside or nearby
9. A massive ball of gas
11. An event that occurs when the shadow of a planet or moon falls upon a second body.
12. A distinctive pattern of stars
13. A vast collection of stars, gas, and dust
14. The time after sunset or before sunrise when the sky is not fully dark
15. set of constellations

1. A "dirty snowball” of ice and rocky debris
2. The changing illumination of the Moon (or other body) over time
3. A star ending its life in a huge explosion
4. When the Moon or other body appears more than half, but not fully, illuminated
6. A brief streak of light caused by a small piece of solid matter entering Earth’s atmosphere
8. A solid body orbiting the Sun that consists of metal and rock
10. When an object moves in the reverse sense of “normal” motion