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.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

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.

Remove ads
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

Cubangbang #170735

Cubangbang 8th Chapter 5 Stack #170735

planets greeks called wanderers
perihelion when a planet is closest to the sun
aphelion when a planet is farthest from the sun
astronomical unit/ ua the earth's average distance from the sun
albedo indicates a planets reflective ability
mass a measure of the amount of matter the planet contains
inferior planets the planets whose orbits are between the earths orbit and the sun
phases the amount and shape of the planet's illuminated surface that is visible from the earth
transits when a planet passes directly between the earth and the sun so that we see its dark silhouette against the sun's bright disk
superior planets planets that are further from the sun than the earth's orbit,move slower than the earth
retrograde motion when the earth passes a superior planet and the planet appears to move backwards compared to the backward stars
terrestrial planets planets that are the earths size or smaller have have about the same density as the earth
jovian also called Jupiterlike stars
gas giants planets that are mostly gaseous
phobos and deimos Mars' two moons named after the attendants of the Greek god of war
galilean moons moons that Galileo discovered
great red spot a feature on jupiter that is a reddish-colored, rotating, oval shaped area that astronomers have been trying to explain for centuries
ganymede a galilean moon that is larger than Mercury and Pluto
Cassini's Division a group of rings that surround Saturn that appears to be completely empty from earth
Uranus discovered in 1781 by William Herschel
Urbain Jean Joseph Leverrier and John Couch Adams two mathematicians that made independent calcuations about where a new planet would have to be to affect Uranus's orbit
Johann Gottfried Galle found a new planet in 1846 less than 1˚ from the position that Leverrier had calculated
Percival Lowell a wealthy american businessman and astronomer that built his own observatory in order to search for a unknown planet and calculated where another planet should be and got pictures of "planet X"
Clyde Tombaugh found the exclusive "planet X"
Pluto earlier called planet X
surface gravity the downward pull the plane exerts on objects at its surface
Created by: bmichaud