Across
- 3. Sometimes you can't see the stars in the sky because of ___________.
- 5. The earth is a ________.
- 6. A scientist who studies space, the planets, and stars.
- 7. An exploding ball of burning gas held together by gravity.
- 8. A repeating path that one object in space takes around another.
- 9. The galaxy we live in.
Down
- 1. The sun and all the planets orbiting it make up the __________.
- 2. An instrument that uses lenses and sometimes mirrors to make distant objects appear larger.
- 4. A system of stars, planets, and lots of gas and dust.
