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Across 1. National Aeronautics and Space Administration 3. Italian astronomer, engineer, and physicist 7. the branch of science that studies celestial objects 8. a man made object that is place in the orbit of a celestial body. 10. a continuous flow of charged particle emitting from the sun 11. a system of star, gas, and dust held together by gravty 12. a group of stars forming a recognizable pattern 14. a brief eruption of intense high-energy radiation on the suns surface 16. a wave length between the end of the visible light spectrum and the microwaves. 18. Is used to study light in a specific proportion of electromagnetic spectrum 19. a hypothetical connection widely separated regions of space time

Down 2. a catadioptric telescope mainly used for wide-angled astronomical photography 4. a trained person to travel in a spacecraft 5. a long term base manned for operations in space 6. a region of space where even light cannot escape 9. used to study outer space 13. a luminous dot shining in the night sky 15. a meteor that survived earths atmosphere 17. a rocky body orbiting the sun, usually in a large numbers of a group