Busy. Please wait.

Forgot Password?

Don't have an account?  Sign up 

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 email address associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
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

Chapt.3 - science

coordinate a set of 2 numbers that specifies the location of a point on graph on a graph
celestial equator the projection of the earth’s equator onto the celestial sphere
declination (DEC) celestial latitude; angular distance north or south of the celestial equator measure in degrees
right ascension (RA) celestial longitude; measured in hours, minutes, and seconds east of the prime hour circle
prime hour circle the reference line for celestial longitude, extending from the north to the south celestial poles through the point of the vernal equinox
magnitude the measure of the brightness of a star; a measure of the amount of energy released by an earthquake
red shift - the difference in the observed wavelengths of light from a celestial body compared to the wavelengths emitted at the source
proper motion - the portion of a star’s motion that is perpendicular to an observer’s line of sight - the portion of a star’s motion that is perpendicular to an observer’s line of sight
radial motion the portion of a star’s motion that is either directly toward or away from the observer
temperature a measure of the average energy of motion of the atoms or molecules of a substance, stated in degrees; the measure of the hotness or coldness of an object
supergiant classify the largest and most luminous stars
white dwarf a very dense, very bright star of about the same mass as the sun but only about a hundredth of its diameter
Created by: elle_cottrell