| A | B |
|---|
| Greeks | assigned brightness to stars |
| Apparent magnitude | brightness as it appears |
| Luminosity | true brightness |
| Hydrogen fusion | star energy production |
| Photosphere | surface of the sun |
| Corona | sun's layer only seen during an eclipse |
| Solar wind | moving solar particles in space |
| Solar flare | bright spot emitting energy on sun's surface |
| Sunspot | dark, cooler area on sun's surface |
| Light year | distance light travels in one earth revolution |
| Proxima Centauri | closest star to our solar system |
| 4.2 light years | distance to Proxima Centauri |
| Black hole | collapsed massive remnant of a supernova |
| Neutron star | pulsar |
| Nebula | dust & gases in space |
| White dwarf | smallest remnant of a star |
| H-R Diagram | graph & grouping of all stars |
| Super giant | largest of all stars |
| Giant | 2nd largest of all stars |
| Main sequence | 90% of all stars are this kind |
| Clusters | star organizations orbiting the galaxy |
| Constellations | stars organized into named areas in the galaxy |
| Gravity | attracts all mater |
| Milky Way | our galaxy |
| Solar spectrum | ROYGBIV |
| Absorption spectrum | light wavelengths absorbed by elements |
| Emission spectrum | light wavelengths emitted in thin lines |
| Violet | highest energy light wavelength |
| Red | lowest energy light wavelength |
| OBAFGKM | star groups |
| Doppler effect | phenomenon related to movement of object |
| Hottest star color | Blue |
| one | brightest Greek star magnitude |
| six | most dim Greek star magnitude |
