Astronomy Crossword

3. a bright body that has a cloudy tail as it moves closer to the sun in its orbit
7. a traveller in a spacecraft
9. National aeronautics space administration
10. orbits earth
13. a unit of length used to measure astronomical distances
15. the spinning of a planet on axis is called
16. each planet in the solar system orbits this star
18. one of the very large groups of stars and other matter found in the universe
19. a division of 12 equal divisions or signs
20. acronym for international space station

1. a band of light that can be seen in the night sky
2. a ball shaped gaseous celestial body (as the sun) of a great mass that shines its own light
3. an area on the celestial sphere in which a group of visible stars form
4. giant cloud of dust and gas in space
5. colossal planet and gas giant
6. the science development and origin of the universe
8. we currently live on this planet
11. the science which studies celestial objects, space and universe
12. largest planet that orbits the sun
14. a gravitational field so intense that no matter or radiation can escape
17. called the red planet