Astronomy Vocabulary

4. all of space and everything in it
5. any celestial object of adequate size that orbits a star
6. a meteoroid burning up in the Earth’s atmosphere due to friction
8. a small object in space made of dust, metal and rock.. smaller than an asteroid but bigger than dust.
10. a celestial object of gas that is self luminous (gives off light) due to the internal energy sources. Our sun is a star
12. a frozen grouping of ice, dust, and rock orbiting the sun, melts as approaches sun causing it to (maybe) have a tail
13. group of stars that form a pattern
14. a collection of millions and billions of stars held together by gravity
15. an object that orbits a planet
16. how bright a star really is

1. how bright a star seems to be because of how close it is to Earth
2. a large object made of dust, metal, and rock left over from the creation of the solar system
3. a group of planets that rotate around a star
7. an object in space
9. A way of measuring distances in space as objects are so far apart. 1 AU is the distance from Earth to the sun
11. a meteoroid that did not completely burn up in the atmosphere and strikes the Earth