Exploring space

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Across
  1. 4. How much energy a celestial object radiates per second
  2. 8. A part of space where gravity pulls so much that no matters or radiation can escape
  3. 10. A giant cloud in space made out of gas and dust
  4. 14. These starts are created when massive stars loose their fuel and colapse
  5. 16. An instrument created to see something from afar
Down
  1. 1. A surface layer of light of a star
  2. 2. A system of billions of stars,gas,and dust, held together by gravity
  3. 3. A theory of how the universe was created
  4. 5. The natural satellite of the earth, visible at night
  5. 6. The explosion of the star
  6. 7. The unit that is used to measure the distance of a planet from the sun
  7. 9. Something that relates to the position or motion of the moon
  8. 11. The planet we live in
  9. 12. The biggest planet in the solar system
  10. 13. A vehicle that gets shot to space with a special engine
  11. 15. The hottest planet in the solar system