Save
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

The Universe

TermDefinition
Absolute Magnitude a measure of how bright a star would be if it were seen from a standard distance
Apparent Magnitude the brightness of a star as seen from Earth
Big Bang Theory the theory that all matter and energy in the universe was compressed into a extremely small volume that 13 billion to 15 billion years ago exploded and began expanding in all directions
Cosmic Microwave Background the electromagnetic radiation leftover from the formation of the universe
Electromagnetic Spectrum all of the frequencies or wavelengths of electromagnetic radiation
Galaxy a collection of stars, dust and gas bound together by gravity
H-R Diagram Hertzsprung-Russell diagram, a graph that shows the relationship between a star's surface temperature and absolute magnitude
Light-year the distance light travels in one year; about 9.46 trillion kilometers
Luminosity the actual brightness of an object such as a star
Main Sequence the location on the H-R diagram where most stars lie; it has a diagonal pattern from the lower right (low temperature and luminosity) to the upper left (high temperature and luminosity)
Nebula a large cloud of gas and dust in interstellar space; a region in space where stars are born
Neutron Star a star that has collapsed under gravity to the point that the electrons and protons have smashed together to form neutrons
Planet a relatively large spherical body that orbits a star
Redshift a shift toward the red end of the spectrum; occurs in the spectrum of an object when the object is moving away from the observer
Solar System the sun and all of the planets and other bodies that travel around it
Star a large celestial body that is composed of gas and that emits light; the sun is a typical star
Supernova a gigantic explosion in which a massive star collapses and throws its outer layers into space
Universe space and all the matter and energy in it
Wavelength the distance from any point on a wave to the corresponding point on the next wave
White Dwarf a small, hot, dim star that is the leftover center of an old sun-like star
Created by: Mrs_Gore
Popular Science sets

 

 



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