Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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. 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 associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Universe

8.8A 8.8B

TermDefinition
Absolute magnitude a measure of how bright a star really is, if all stars were the same distance from Earth
Apparent magnitude a measure of how bright a star appears as seen from Earth
Galaxy a system of stars and associated matter, held together by gravitational attraction
Hertzsprung-Russell diagram a diagram that shows the relationship between the brightness, surface temperature, and color of stars
Luminosity total amount of light (energy) emitted by a star or other celestial body
Magnitude the measure of the observed visible brightness of a star
Nebulae clouds of dust and gas; site of star formation; remains of dead or dying stars
Star luminous globe of gas which produces its own heat and light by nuclear reaction
Universe all of space and its contents
Wavelength distance from any one point on a wave to a corresponding point on the next wave; crest to crest or trough to trough
Sun medium size star located in the spiral arm of the Milky Way galaxy; many thousands of times closer star to the Earth
 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards