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Stars
Vocab
| Term | Definition |
|---|---|
| Life Cycle of a star | Infant -> youth -> middle age -> old age -> death |
| Interstellar Medium | A thinly spread area of gas and dust |
| Nebula | -Interstellar medium begins to collect into big clouds - Birthplace of stars |
| Protostar | -Inside the nebula are regions with greater and lesser gravity, causing the gas and dust to pull together. -Not very stable phase |
| Equilibrium | -A battle between gravity and gas pressure -Reached when both are even |
| Star | An extremely hot ball of gas with hydrogen fussing into helium at its core |
| Main Sequence | -Stars live out most of their lives in this stage -Stars have achieved nuclear fusion and stay at equilibrium |
| Red Giant | -Phase after Main Sequence - Outer gas layers of the star expand but the core shrinks -Red in color, very high luminosity |
| Planetary Nebula | -Occurs at the end of a low mass red giant's life -the outer layers of the star are expelled and the shell appears as brightly colored gas clouds - Core is very hot an luminous |
| White Dwarf | -Forms when a low mass star runs out of fuel -Incredibly dense and will change color as it cools. |
| Black Dwarf | -End product of white dwarf -the last stage of stellar evolution for low mass stars. |
| Red Super Giant | -Same thing as a giant star but much bigger -As the star gets older it begins to sun out of fuel and expand |
| Supernova | -Last stage of a massive stars life -Occurs as the star runs out of nuclear fuel and some of its mass flows into its core -Core collapses since it is so heavy and results in a giant explosion |
| Neutron Star | -Core left behind after a supernova -Very very dense |
| Black Hole | Forms when a very massive star collapses at the end of their life cycle - A large area in space with a very strong gravitational pull. |
| Hertzsprung–Russell diagram | Plots each star on a graph and measures it magnitude (brightness) against its temperature(color) |
| Luminosity | -The amount of energy (light) a star emits -Brightness |
| Brightness | -The amount of energy (light) a star emits -Luminosity |
| Absolute Magnitude | -The measure of a stars brightness as if it were at a standard distance of 10 parsecs from the observer |
Created by:
aliak_smsknights