Space Vocab

3. the study of space
7. a celestial body moving in an elliptical orbit around a star.
8. A calander that shows the dates of the year
10. the curved path of a celestial object or spacecraft around a star, planet, or moon, especially a periodic elliptical revolution.
12. planet a small planet
13. all existing matter and space considered as a whole
14. a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun
16. s the distance that light travels in vacuum in one Julian year
17. the natural satellite of the earth,
18. a theoretical cloud of predominantly icy planetesimals proposed to surround the Sun
19. a torus-shaped region in the Solar System, located roughly between the orbits of the planets Jupiter and Mars, that is occupied by a great many solid, irregularly shaped bodies, of many sizes but much smaller than planets, called asteroids or minor planets

1. Earth and planets revolve around the Sun at the center of the Solar System
2. weight of something
4. a region of the solar system beyond the orbit of Neptune believed to contain many comets, asteroids, and other small bodies made largely of ice
5. a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction
6. system the 8 planets and the orbit of the moon
9. an imaginary line about which a body rotates.
11. a superseded description of the Universe with Earth at the center
15. a large light in the sky at night