| A | B |
|---|
| nebulas | The remains of a supernova exlposion. |
| galaxy | A vast collection of billions of stars. Planets. Dust and gas held together by the force of gravity. |
| red shift | A shining body is moving away, _______ is observed in the colors of the spectrum. |
| light year | The distance light travels in one year. |
| parallax | The apparent change in position of an object that is caused by the motion of the observer. |
| main sequence star | Is one of the group of stars that forms a diagonal band acrossa graph of star class and brightness. |
| nova | The Latin word meaning "new," is used to name a star that explodes and becomes much larger and brighter. |
| supernova | A star that explodes to millions of times it normal brightness. |
| white dwarf | Is a collapsed star in the last stage of life in the main sequence. |
| red giant | When the outer regions of a star cools, it expands into a. |
