Astronomy Crossword

4. A unit of distance equal to the distance that light travels in a vacuum in one mean solar year.
6. The North star.
8. The sun and all the planets, satellites, asteroids, meteors, and comets that are subject to its gravitational pull.
9. The path that an astronomical object, such as a planet, moon, or satellite follows around a larger astronomical object such as the sun.
10. There are 6 of these in Canada.
12. The scientific study of the universe.
13. An astrological object composed of a mass of ice and dust.

1. An astronomical object that orbits a star and does not shine with its own light.
2. A gaseous mass in space that generates energy by thermonuclear reactions.
3. A group of stars that form a distinctive pattern.
5. A complete circle made by a planet or satellite around the sun.
7. An early instrument used to observe the position and determine the altitude of the sun or other astronomical objects.
11. All the planets orbit around the ___.
12. Orbiting pieces of rock of different size and brightness.