Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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
Know
remaining cards
Save
0:01
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:
Retries:
restart all cards
share
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

astronomy vocab pt 2

TermDefinition
photosphere a luminous envelope of a star from witch its light and heat radiate
chromosphere layer of gas above the photosphere of the sun
corona a gaseous envelope of the sun and other stars
solar wind a flow of continuous changed partials from the sun
sunspot a patch that appears on suns surface from time to time darkened by surroundings
prominece the condition of something
solar flare a brief eruption of high energy radiation from suns surface
nuclear fusion a nuclear reaction that releases energy
constellation a group of stars forming a pattern
binary star two stars in witch one revolves around the other
light year the distance that light travels in one year
apparent magnitude magnitude of celestial object as accurately measured from earth
absolute magnitude the magnitude of an object as seen from standard distance
main sequence star a star that is fused with hydrogen from the core
red giant a very large star with a low surface tempature
supergiant very large star that is brighter than a giant
nova a star showing large increase in brightness then returning to normal state over time
Hertzsprung-Russell diagram two dementional graph that shows absolute magnitude of stars
protostar contracting gas that represents early stage in the formation of a star
supernova a star that suddenly increases in brightness
white dwarf small very dense star that is typically the size of a planet
neutron star small star with very high density
black hole a region of space that has a gravitational field so intense nothing can escape
galaxy millions and billions of stars together with gas and dust and held together by gravity
big bang theory a theory that the universe originated billions of years ago by an explosion
Created by: 3143305