Details

Title: Astronomy Book Vocabulary

Description: Chapter 4/Section 2

Total Flash Cards: 8

Created: 12/04/2008 04:03:21

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Additional Astronomy Flashcards

Cards in this set:

Term
constellation
 Definition
an imaginary pattern of stars in the night sky
Term
spectrograph
 Definition
an instrument that separates light into colors and makes an image of the resulting spectrum
Term
main sequence 
 Definition
a diagonal area on an H-R diagram that includes more than 90% of all stars
Term
Hertzsprung-Russell diagram
 Definition
a graph relating the surface temperatures and absolute brightness of stars
Term
apparent brightness
 Definition
the brightness of a star as seen from Earth
Term
absolute brightness
 Definition
the brightness a star would have if it were at a standard distance from Earth
Term
parallax
 Definition
the apparent change in position of an object when seen from different places
Term
light-year
 Definition
the distance that light travels in one year