Across
- 2. first person to walk on moon
- 5. Space agency for Russia
- 9. Small rocky object orbiting the sun
- 11. First woman in space
- 12. Instrument to measure distance to stars
- 13. Orbits the Earth
Down
- 1. Weightless environment
- 3. Fuel used by rockets
- 4. international Space Station (abbr.)
- 6. Reusable spacecraft
- 7. Landing module used in Apollo missions (7)
- 8. Protective suit worn by astronauts (8)
- 10. Vehicle that takes astronauts to space (9)