Across
- 2. — The __ system: our Sun and everything gravitationally bound to it
- 4. — The __ Test Project: joint US-Soviet docking mission, 1975
- 7. — The __ telescope: repaired by astronauts in 1993
- 8. — First Space Shuttle to fly, mission STS-1, April 1981
- 10. — Leaving a spacecraft to work in open space: three letters
- 11. — Unmanned vehicle that roves across a planetary surface
- 12. — The programme that first landed humans on the Moon
- 13. — NASA programme that preceded Apollo; first US spacewalk
Down
- 1. — NASA's first human spaceflight programme, one astronaut
- 2. — Reusable winged spacecraft retired by NASA in 2011
- 3. — A probe that orbits a body rather than landing
- 5. — Soviet probe — first spacecraft to soft-land on the Moon
- 6. — Soviet cosmonaut and first human in space, 1961
- 8. — Mars rover exploring Gale Crater since landing in August 2012
- 9. — Elon Musk's commercial space company, founded 2002