| A | B |
|---|
| Hertzsprung-Russell Diagram | Compares a star's brightness and Temperature |
| Red Giant | A massive star that burns for millions of years |
| white dwarf | The remnant of a medium size star |
| yellow dwarf | Our sun |
| The Big Bang Theory | A theory of how the universe began |
| Red shift | Objects are moving away from others in space |
| Blue shift | Objects are moving towards others in space |
| Edwin Hubble | The astronomer that discovered galaxies and that they are moving apart |
| Spiral galaxy | Andromeda Galaxy |
| Elliptical galaxy | M32 Galaxy |
| Irregular galaxy | Large and Small Magellanic Clouds |
| Black Hole | An area of intense gravity- even light can't escape |
| Neutron Star | One of the possible out comes of a Super Nova |
| Super Nova | An explosion of a massive star |
| Protostar | A newly formed star |
| Stellar Dust and gas | The birthplace of stars |
| Thermodynamic Equalibrium | The energy of heat is balanced equally |
| Hydrogen is converted to helium | Nuclear Fusion |
| Main Sequence | Most stars fall in this category |
| The Milky Way Galaxy | Our galaxy |
| Planetary Nebula | The second to last stage of most stars |
| Doppler Effect | The apparent change of sound or light waves |
| The distance light travels in a year | 6 trillion miles |
| The speed of light | 186,000 miles/second |
| The approximate age of the universe | between 12 to 14 billion years |
