The collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.

A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.

A celestial body moving in an elliptical orbit around a star.

The unit of astronomical distance equivalent to the distance that light travels in one year

Upgrade to remove ads

Busy. Please wait.

Don't have an account? Sign up

taken

Age:

12 or younger
13 or older

Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password

Enter the email address associated with your account, and we'll email you a link to reset your password.

Help

Options

focusNode

Didn't know it?
click below

Knew it?
click below

Don't Know

Remaining cards (0)

Know

retry

shuffle

restart

0:00

Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Unit 2 Lesson 1/2

Term	Definition
Solar system	The collection of eight planets and their moons in orbit around the sun, together with smaller bodies in the form of asteroids, meteoroids, and comets.
Galaxy	A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
Planet	A celestial body moving in an elliptical orbit around a star.
Light year	The unit of astronomical distance equivalent to the distance that light travels in one year