Astrophysics

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Across
  1. 1. A frozen body that forms a glowing tail when near the Sun
  2. 5. The force that keeps planets in orbit around the Sun
  3. 8. A huge explosion marking the death of a massive star
  4. 9. A massive group of stars held together by gravity
  5. 10. A path an object follows as it moves around another object
Down
  1. 2. A telescope used to see far into space
  2. 3. The distance light travels in one year
  3. 4. A collapsed star so dense not even light escapes
  4. 6. System   A system that includes the Sun, planets, and other objects
  5. 7. A planet outside our solar system