| A | B |
|---|
| Neutron Star | A dense core of neutrons that remains after the supernova. |
| Doppler Shift | The shift to a different wave length on the electromagnetic spectrum or sound waves due to motion. |
| Nebula | A cloud of gas and dust where stars are born. |
| Dark Matter | Matter that emits no light at any wave length. |
| Black hole | An object whose gravity is so great that no light can escape. |
| Dwarf Planet | A spherically shaped object that orbits a star with objects similar in mass orbiting near it or crossing its orbital path. |
| Big Bang Theory | The scientific explanation which states that the universe began from one point and has been expanding and cooling ever since. |
| sun spots | dark spots on the sun caused by disturbances of the sun's magnetic field, these are used for tracking the rotation of the Sun |
| solar flare | A sudden eruption of intense high-energy radiation from the sun's surface |
| prominence | A loop of gas that protrudes from the sun's surface, linking parts of sunspot regions |
| Aurora Borealis (Northern Lights) | A colorful, glowing display in the sky caused when particles from the sun strike oxygen and nitrogen atoms in the ionosphere |
| Supernova | the brilliant explosion of a dying supergiant star |
| white dwarf | A small, hot, dim star that is the leftover center of an old star |
| main sequence | a diagonal area on an H-R diagram that includes more than 90 percent of all stars |
| Protostar | A contracting cloud of gas and dust with enough mass to form a star |
| planetary nebula | a ring-shaped nebula formed by an expanding shell of gas around an aging star. |
