If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Unit 1: Earth in space

400 possible mastery points

About this unit

Ready to blast off into the far reaches of the universe? In this unit, you'll learn all about Earth's place in the cosmos, explore the mysteries of galaxies and gravity, and take a grand tour of our very own solar system.

The Milky Way: it's more than just a candy bar.
Level up on the above skills and collect up to 240 Mastery points
Earth isn't flat, but our solar system is.
Up next for you:

Unit test

Level up on all the skills in this unit and collect up to 400 Mastery points!