Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
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

Sun Earth Moon


Rotation the action of rotating around an axis or center.
Revolution to go around or movement
Orbit move around the plants
Geocentric Theory a system which puts the Earth in the center of the universe
Heliocentric theory the earth revolves around the sun
Astromony space, and the physical universe as a whole.
Solar system the collection of eight planets and their moons in orbit around the sun
Telescope an optical instrument designed to make distant objects appear nearer
Commet a celestial object consisting of a nucleus of ice and dust
Gravity the force that attracts a body toward the center of the earth
Astronomer an expert in or student of astronomy
NASA The National Aeronautics and Space Administration
Axis an imaginary line about which a body rotates
Tilt move or cause to move into a sloping position
Meters he fundamental unit of length in the metric system
Constalation a group of stars forming a recognizable pattern that is traditionally
Vernal Equinox spring, sun was right at the equator March 21st
Autumnal Equinox fall, Sun is right at the equator september 22nd and 23rd
Summer Solstic summer, the sun is north of the equator at the Tropic of Cancer June 21st
Winter Solstic winter, December 21st the sun is further south at the tropic of capricorn
Created by: 1964109916