Solar System

2. a heavenly body other than a comet, asteroid, or satellite that travels in orbit around the sun
4. the planet sixth in order from the sun
7. the planet seventh in order from the sun
11. a person whose profession is to travel beyond the earth's atmosphere
12. the planet on which we live
13. one of thousands of small rocky bodies between Mars and Jupiter with diameters from a fraction of a kilometer to nearly 800 kilometers
14. the earth's natural satellite that shines by reflecting light from the sun and revolves about the earth in about 29½ days
15. the planet second in order from the sun
18. the planet nearest the sun
19. a natural body visible in the sky especially at night that gives off light or shines by reflection

1. the planet eighth in order from the sun
3. the star around which the planets revolve, from which they receive heat and light
5. the whole body of things observed or assumed
6. the largest of the planets and fifth in order of distance from the sun
8. the explosion of a very large star in which the star temporarily gives off up to one billion times more energy than the sun
9. bright heavenly body that develops a cloudy tail as it moves closer to the sun in its orbit
10. any of the very large groups of stars and associated matter that are found throughout the universe
11. a person who is skilled in astronomy
14. the planet fourth in order from the sun
16. the region beyond the earth's atmosphere or the limitless three-dimensional extent in which all things exist and move
17. the gravitational attraction of the mass of a heavenly body (as the earth) for bodies at or near its surface