Space

1. An instrument used to observe distant objects in space.
3. A vast system of stars, gas, and dust held together by gravity.
5. A person trained to travel and work in space.
9. When one celestial body obscures or blocks the light of another.
14. A powerful and explosive event that occurs during the death of a massive star.
15. Existing or occurring between stars.
17. The force that attracts objects towards each other.
19. An astronaut from Russia or the former Soviet Union.
20. A celestial body that orbits around a star.

2. An object that orbits around a larger body in space.
4. A vehicle designed for travel or operation in outer space.
6. A vehicle designed to propel itself by expelling exhaust gases from one end.
7. A cloud of gas and dust in space, often where stars are formed.
8. A small body of matter that enters the Earth's atmosphere and burns up, also known as a shooting star.
10. A luminous celestial object made up of gas and emitting light.
11. The path followed by one object around another due to gravity.
12. The study of the movements and positions of celestial bodies to make predictions or interpretations.
13. System The system comprising the Sun and the celestial bodies that orbit around it.
16. Relating to the moon.
18. A celestial object made up of ice, dust, and gas that orbits the Sun.