Stargazing Crossword

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