Cosmic Crossword

Advanced Space-themed Crossword Puzzle

1. An aerial phenomenon with an unknown source
1. The world of space and time
2. A star that suddenly increases in brightness and then fades away quickly
3. A shortcut through the universe
4. A telescope-equipped facility
5. Object in space that orbits the earth
6. A round object that rises and sets each day
7. A tool to observe distant objects
8. Person who studies the motion, composition, and origin of celestial bodies
9. Course taken by a spacecraft around a celestial body
10. A visitor from another planet
11. A large system of stars, dust, and gas held together by gravity
12. A device used to travel to outer space
13. A small, rocky object that moves around the sun
14. The branch of science that deals with the origin, evolution, and structure of the universe
15. A force that pulls objects toward each other
16. One who flies in a spacecraft
17. A mission to go outside a space vehicle
18. A celestial object with a bright, long tail that orbits the sun