Across
- 3. everything space and all the matter and energy in it
- 4. system- the sun,the planets,and various other smaller bodies
- 7. often used to describe a spacecraft that drops into a planets atmosphere
- 9. is called
- 14. of rotation-earth rotates on an imaginary line running through the center
- 15. it is a spreading cone of lighter shadow is called the
- 18. station-is a satellite in which people can live and work for long periods
- 19. a group of millions or billions of stars held together by their own gravity
- 20. is the path of an object in space as it moves around another object because of gravity
Down
- 1. the darkest part
- 2. when a shadow makes the sun or moon seem to grow dark
- 5. a group of stars that form a pattern i the sky
- 6. area of sunlight is at its maximum in one hemisphere and a minimum at the other
- 8. a craft designed to land on a planets surface
- 10. shines equally on the northern and southern hemisphere
- 11. an object that orbits a more object
- 12. radiation-visible light
- 13. crater-a big round pit caused by a explosion from something in space
- 16. the motion of one object around another
- 17. dark area on the moon