Across
- 2. - Cosmic microwave background radiation discovered.
- 6. - The Moon landing missions began in the 60s.
- 7. - Solar wind discovered.
- 11. - The first exoplanet discovered.
- 12. - Discovered in 1967, rotating neutron star.
- 14. - Saturn’s rings were explored further.
- 15. - Studied extensively in the 1960s.
Down
- 1. - Evidence of water found in 1960s.
- 3. - Mariner spacecraft reached this planet.
- 4. - Black holes were theorized and studied
- 5. - Bright, distant celestial objects.
- 8. - Cosmic X-ray sources identified.
- 9. - Soviet probe to Venus.
- 10. - Tool used for deep space observation.
- 13. - Atmosphere studied in the 1960s.