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Life Cycle of A Star
Vocabulary for Life Cycle of a Star
| Term | Definition |
|---|---|
| Life Cycle of a Star | Stars go through a natural cycle, much like any living beings. This cycle begins with birth, expands through a lifespan characterized by change and growth, and ultimately leads to death. |
| Interstellar Medium | the material which fills the space between the stars. |
| Nebula | a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter. |
| Protostar | a contracting mass of gas which represents an early stage in the formation of a star, before nucleosynthesis has begun |
| Equilibrium | a state in which opposing forces or influences are balanced. |
| Star | a fixed luminous point in the night sky which is a large, remote incandescent body like the sun. |
| Main Sequence | a series of star types to which most stars belong, represented on a Hertzsprung–Russell diagram as a continuous band extending from the upper left (hot, bright stars) to the lower right (cool, dim stars). |
| Red Giant | a very large star of high luminosity and low surface temperature. Red giants are thought to be in a late stage of evolution when no hydrogen remains in the core to fuel nuclear fusion. |
| Planetary Nebula | a ring-shaped nebula formed by an expanding shell of gas around an aging star. |
| White Dwarf | a small very dense star that is typically the size of a planet. A white dwarf is formed when a low-mass star has exhausted all its central nuclear fuel and lost its outer layers as a planetary nebula. |
| Black Dwarf | a very small cooled remnant of white dwarf that emits no detectable light. |
| Red Super Giants | An extremely large red giant star with a minimum of 15 solar masses. |
| Supernova | a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass. |
| Neutron Star | any of a class of extremely dense, compact stars thought to be composed primarily of neutrons. Neutron stars are typically about 20 km (12 miles) in diameter. |
| Black Hole | a region of space having a gravitational field so intense that no matter or radiation can escape. |
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klstorie
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