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Across 2. built in drop-away sections (2 Words) 4. objects that emit radio waves (2 Words) 7. an outflow of particles from a star (2 Words) 10. a type of telescope with a lens for the objective 11. a man-made orbiting object (2 Words) 12. carried by a rocket 16. using a planet's gravity to accelerate (2 Words) 18. an object seen in the sky (2 Words) 20. a model that places the sun at the center of the solar system 21. the Russian term for astronaut 22. turns at the same speed as the Earth 23. a grouping of stars that forms a pattern

Down 1. the distance light travels in a year 3. the variety of energy waves from stars (2 Words) 5. rocky terrestrial planets (2 Words) 6. the angle above the horizon 8. a device that measures altitude 9. measuring distance by creating an imaginary triangle between an observer and an object 13. a celestial body that orbits a star 14. the distance from the ear (2 Words) 15. 200-800 km above Earth (3 Words) 17. a model that places the Earth at the center of the universe 19. a device used to magnify dist 21. a device used to measure azimuth 22. sattelite-and-handheld locating system