| A | B |
|---|
| giant star | star with a diameter about 10 to 100 times larger than the sun |
| supergiant star | star with a diameter 1000 times the diameter of the sun |
| white dwarf | star about the size of Asia |
| neutron star | smallest and densest of all stars |
| apparent magnitude | a star's brightness observed from Earth |
| absolute magnitude | a star's actual brightness |
| Hertzsprung-Russell | chart that shows relationship between brightness and temperature |
| main-sequence star | star group shown from upper left to lower right on H-R diagram |
| parallax | apparent change in position of a star |
| nuclear fusion | combining of two atomic nuclei |
