Across
- 2. An astronomical body that shines or that is luminous.
- 3. Space The space that exists beyond Earth and its atmosphere.
- 5. Beings that do not belong to planet Earth.
- 6. What astronauts travel in to go to outer space.
- 7. A rocky mass near Earth.
- 10. System A group of objects that go around the sun.
- 11. The closest star to Earth.
Down
- 1. A person trained to travel in a spacecraft.
- 4. A device to observe distant objects.
- 8. A round astronomical body.
- 9. To go around a planet or the moon.