Ch 8-11

1. a large, gas-rich planet that grew primarily through the accretion of ice-rich planetesimals.
6. a planet not orbiting our Sun.
7. a planet whose orbit lies in the outer part of the Solar System. Jupiter, Saturn, Uranus, and Neptune are outer planets.
10. the Sun, planets, their moons, and other bodies that orbit the Sun.
12. a small, generally rocky, solid body orbiting the Sun and ranging in diameter from a few meters to hundreds of kilometers.
13. a small body in orbit around the Sun, consisting of a tiny, icy core and a tail of gas and dust.
14. a meteorite containing small spherical grains called chondrules.
15. the distance from an astronomical body at which its gravitational force can pull apart another astronomical body.
16. an object that orbits the Sun and is massive enough that its gravity compresses it into an approximately spherical shape
17. a dark band in a Jovian planet’s atmosphere, encircling the planet.
18. a reddish colored region in Jupiter’s atmosphere, larger than Earth.
20. a planet orbiting in the inner part of the Solar System. Sometimes taken to mean Mercury, Venus, Earth, and Mars.
21. the velocity of a body along the line of sight.

2. a small spherical grain embedded in a meteorite.
3. cliffs formed where the crust has shifted that run for hundreds of kilometers across a planet’s or moon’s surface.
4. a planet that grew largely by gravitationally attracting gas from the disk of gas out of which a planetary system form.
5. a vast region in which comet nuclei orbit. This cloud lies far beyond the orbit of Neptune.
8. a region between the orbits of Mars and Jupiter in which most of the Solar System’s asteroids are located.
9. the technical name for the small, solid bodies moving within the Solar System.
11. the bright trail of light created by small solid particles entering Earth’s atmosphere and burning up.
19. a condition in which the repetitive motion of one body interacts with the repetitive motion of another so as to reinforce the motion.