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Earth Science
Vocab Terms
| Term | Definition |
|---|---|
| Astronomy | study of the physical universe, space and celestial objects |
| Big Bang Theory | universe may been created in explosion 12 billion years ago |
| Doppler Shift | change in frequency |
| Red Shift | object moves away from observer at high speed, light object appears redder |
| Blue Shift | Doppler Shift of object coming towards us. (shorter wave lengths of visible lights are bluer) |
| Frequency | how many waves peak pass a certain point per given time |
| Wavelength | distance between two corresponding parts of a wave |
| Absolute Brightness | How bright the star really is |
| Apparent Brightness | How bright star appears |
| CMB | thermal radiation to be "left over" from Big Bang |
| Universe | All of space and everything in it |
| Galaxy | Collection of stars, sudt, and gas bound together by gravity |
| Solar System | Sun, Planets and other objects that revolve around the sun |
| Star | luminous point in night sky that is large |
| Planet | large body in space orbits a star and doesn't produce own light |
| Electromagnetic Spectrum | All frequencies or wavelengths of electromagnetic radiation |
| Astronomical Unit | Unit length used for distances within the solar system |
| Solar Nebula | Cloud of gas and dust that formed our solar system |
| Gas Giant | planet has deep, massive atomosphere. like Jupiter, Saturn, Uranus, Neptune |
| Nuclear Fusion | Process which 2 or more small nuclei fuse to makebigger nucleus |
| Zone | region of Sun where gases circulate in convection currents, bringing the Sun's energy to the surface |
| Photosphere | inner layer or Sun's atomosphere |
| Chromoshpere | Middle layer of Sun's Atomsphere |
| Corona | outer layer of Sun's atomsphere |
| Sunspot | Cooler darker spot appering periodically on Sun's photosphere |
| Promincence | Loop of gas that protrudes from the sun's surface linking parts of sunspot regions |
| Solar Flare | Suden eruption of intense high energy radiation from the Sun's surface |
| Coronal Mass Ejection | Large explosion of matter and energy from the sun |
| Light Year | distance light travels in one year |
| Parallax | apparent shift in position of an object when viewed from different locations |
| Nebular | sun and planets from rotating disk of dust and gases |
| Red Giant | large reddish star late in it's life cycle |
| White Dwarf | small, hot dim star of closely packed nuetrons from collapsing star |
| Pulsar | |
| Blackhole | object so dense light cannot escape it's density |
| Constellations | group of stars that from a shape or pattern |
| Cosmology | Study of universe |