Across
- 1. system / the collection of eight planets and their moons around the sun
- 3. / we live on _____ Earth
- 4. / to make a journey
- 5. way trip / not a return trip
- 6. / the ______ we live in is called the Milky Way...
- 8. / a substance like air
- 9. / the circular journey that a spacecraft or planet makes around the sun, moon or other planet
- 10. / the physical universe beyond the earth's atmosphere
Down
- 1. / a vehicle used for traveling in space
- 2. / someone who goes to space
- 7. / the air that surrounds a planet