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

Lesson 12-3

Stars

TermDefinition
light year distance that light travels in a year
black dwarf how our sun will finish its life
supernova enormous explosion of a red supergiant
black hole exerts such a strong gravitational pull that no light can escape
neutron star the remnants of a dead massive star; dense spinning spheres
main sequence stars 90% of stars are in this stage; most of star's life is spent in this stage
nebula a large cloud of gas and dust
planetary nebula a nebula of gas surrounding a star
protostar earliest stage of a star's life
mass how much matter an object contains
constellation a group of stars that form a pattern in the sky
galaxy large grouping of stars, gas, and dust in space held together by gravity
nuclear fusion when hydrogen atoms join together to form helium
absolute brightness (absolute magnitude) The brightness of a star if it were a standard distance from Earth
apparent brightness (apparent magnitude) the brightness of a star as seen from Earth
spectrograph a device that breaks light into colors and produces an image of the composition of a star
Kelvin the SI unit for temperature
luminosity the true brightness of an object
Hertzsprung-Russell diagram a graph relating the surface temperatures and absolute brightness of stars
star A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion.
universe Space and all the matter and energy in it
white dwarf A small, hot, dim star that is the leftover center of an old star
gravity A force of attraction between objects that is due to their masses and the distance between them
solar radii (Rsun) radius in comparison to sun's radius
Created by: user-2053147
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