"Astronomy 102 Vocabulary": HTML5 Crossword

Across

3. Hot clouds of gas and dust which provides the birthplace of stars. (6)
4. A large ball of gas that generates its own energy (light and heat) through the fusing of Hydrogen atoms. (4)
6. These are small rocky or metallic objects traveling through space. Most are fragments from a comet or an asteroid. (9)
7. All the mass and energy in existence - made up of galaxies and the space between them. (8)
8. The distance that light will travel in one year. (5,4)
11. A hunk of rock flying through space. They tend to orbit around the Sun and group together in belts. (8)

Down

1. An astronomical object orbiting a star that is large enough to be rounded by its own gravity. (6)
2. These are meteoroids that enter a planet's atmosphere causing a visible streak of light. (6)
5. A system of bodies (planets, comets, etc.) that revolves around a star. (5,6)
9. A collection of millions of stars and interstellar gas and dust that stay close together due to gravity. (6)
10. Made of ice, dust, and small rocky particles. These objects have an atmosphere of two main parts - the coma and the tail. (5)