| A | B |
|---|
| quasars | give off an extraordinary amount of energy |
| Large Magellanic Cloud | irregular galaxy |
| Milky Way | spiral galaxy |
| hydrogen | most common element in stars |
| supernova | explosion of massive star |
| gravity | force that pulls things together |
| pulsars | neutron stars |
| binary stars | pulsating variable stars |
| red-shift | measures distance to stars |
| measures distance to stars | parallax |
| star in Milky Way | sun |
| Algol | example of binary star system |
| Gemini and Orion | constellations |
| Hertzsprung-Russel | plotted diagram of stars |
| spectroscope | breaks light from stars into colors |
| spiral galaxy | shaped like a pinwheel |
| light year | measures distance in universe |
| iron | heavy element formed in fusion |
| main factor in life cycle of star | mass of a star |
| Alpha Centauri | closest star to sun |
| prism | breaks light into spectrum |
| optical telescopes | detects visible light |
| radiation | supports big bang theory |
| nova | star brightens and dims |
| Van Maanen's star | white dwarf |
| star color | determined by surface temperature |
| fusion | causes temperature of a star to increase |
| magnitude | brightness |
| prominence | solar storm |
| corona | sun's outer layer of atmosphere |
| black hole | created from death of massive star |
| Spica | not a main sequence star |
