Space Crossword

12345678910
Across
  1. 3. Aliens from Mars
  2. 6. About 27% of the universe is made up of
  3. 7. The Roman god of the sea
  4. 8. The first company that Dr. Robert Jensen worked for
  5. 10. Human space travel for recreational purposes
Down
  1. 1. One million of these could fit inside the sun
  2. 2. Rockets do not require this gas, unlike jet engines
  3. 4. The 1996 film sports comedy film starring basketball player Micheal Jordan
  4. 5. No longer adding to the total amount of greenhouse emissions
  5. 9. On Saturn it rains...