| A | B |
|---|
| Chromosphere | Layer of the Sun's atmosphere above the photosphere. Only visible during a solar eclipse |
| Corona | Top layer of the Sun's atmosphere, extends millions of km into space |
| Fission | The splitting of heavy atomic nuclei into smaller, lighter atomic nuclei |
| Fusion | The combining of lightweight nuclei into heavier nuclei |
| Photosphere | The lowest layer of the suns atmosphere |
| Prominence | An arc of gas ejected from the chromosphere |
| Solar Flare | Violent eruptions of particles and radiation from the surface of the sun |
| Solar Wind | Gas that flows outward from the corona at high speeds |
| Spectrum | Visible light arranged by wavelength |
| Sunspot | Dark spots on the surface of the photosphere |
| Absolute Magnitude | The brightness an object would have at a distance of 10 pc |
| Apparant Magnitude | How bright a star appears to be |
| H-R Diagram | A graph of stars that plots absolute magnitude vs. temperature |
| Luminosity | The energy output from the surface of a star per second |
| Main Sequence | Where 90% of all stars fall on the H-R diagram |
| Parallax | The apparent shift in position of a star caused by the motion of the observer |
| Black Hole | Extremely dense remnant of a star whose gravity is so strong that not even light can escape |
| Nebula | A cloud of interstellar gas and dust |
| Neutron Star | Collapsed, dense core of star |
| Protostar | Forms as a nebula contracts and forms a disk shape with a hot condensed object at the center |
| Supernova | When the entire outer portion of a star is blown off in a massive explosion |
