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