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Astronomy
| Term | Definition |
|---|---|
| Solar System | The Sun and its family of orbiting planets, moons, and other objects. |
| Star | A ball of hot gas, primarily hydrogen and helium, that undergoes nuclear fusion. |
| Stellar Spectra | Continuous black body spectrum and photo-sphere. |
| Planet | A large body in space that orbits a star and does not produce light of its own. |
| Solar Nebula | A rotating cloud of gas and dust from which the sun and planets formed. |
| Gas Giant | A large planet composed mainly of gas. |
| Nuclear Fusion | The process by which hydrogen atoms join together to form helium, releasing energy. |
| Main Sequence | A diagonal area on an H-R diagram that includes more than 90 percent of all stars. |
| HR Diagram | A graph relating the temperature and brightness of star. |
| Nebular | A cloud of gas and dust that is in outer space. |
| Red Giant | A large, reddish star late in its life cycle. |
| White Dwarf | hot, extremely dense core; shine for billions of years; lower left on H-R diagram. |
| Nova | A star that explosively increases in brightness. |
| Neutron Star | The ultimate end of a massive star as a result of a supernova. |
| Pulsar | A rapidly spinning neutron star that emits rapid pulses of radio and optical energy. |
| Black Hole | A place in space that has a gravitational pull so strong that nothing can escape |
Created by:
MarsDonelli
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