Space

2. the point at which the sun is as far north or as far south of the equator as possible
4. the study of the universe
5. the motion of a body that travels around another body in space, one complete trip is an orbit
8. the degree of elongation of elliptical orbit.
10. any of the primary bodies that orbit the sun
11. a small body from which a planet originated in the early stages of development of the solar system.
13. the point in an orbit of a planet at which the planet is closest to the sun
15. a collection of stars, dust and gas bound together by gravity.
16. the spinning of earth on its axis
17. the point in an orbit that the planet is furthest from the sun

1. the unit of measure the distance between the earth and the sun
3. an instrument that collects electromagnetic radiation from the sky
6. a rotating cloud of gas and dust from which the sun and planets formed
7. a telescope that uses a set of lens to gather and focus light from distant objects
9. a telescope that uses curved mirror to gather and focus light from distant objects
12. the spacecraft that was in orbit around Jupiter and its moons from 1995 to 2003
14. the moment when the sun appears to cross the celestial equator