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Brian Hernandez ESPS
Astronomy
| Term | Definition |
|---|---|
| Astronomy | study of the universe |
| Big Bang Theory | Theory that explains the creation of the universe |
| Doppler shift | the apparent change in the wavelength and frequency of sound waves that is could by the movement of the source, observer, or both |
| Red Shift | Is when a planet or star gets further away |
| Blue Shift | When a planet or star gets closer |
| Frequency | the number of waves produced in a given amount of time |
| Wavelength | the distance between corresponding points on a waves |
| Absolute Brightness (Magnitude) | how bright a star actually is |
| Apparent Brightness (Magnitude) | How bright a star looks |
| Cosmic Microwave Background (CMB) | radiation left over from the big bang |
| Universe | All of Space |
| Galaxy | A group of stars,gas,dust held by gravity |
| Solar System | Planets, suns and other things that rotate the sun |
| Star | A ball of hot gas, made up of hydrogen and helium, that undergoes nuclear fusion. |
| Planet | An object that orbits a star, is large enough to have become rounded by its own gravity, and has cleared the area of its orbit. |
| Electromagnetic Spectrum | All of the frequencies or wavelengths of electromagnetic radiation |
| AU-Astronomical Unit | Units used to measure the distance of the solar system |
| Solar Nebula | the cloud of gas and dust that formed our solar system |
| Gas Giant | Jupiter, Saturn, Uranus, Neptune |
| Nuclear Fusion | The process by which two or more small nuclei fuse to make a bigger nucleus |
| Convective Zone | hot plasma rises, cools as it nears the surface, and falls to be heated and rise again. |
| Photosphere | the luminous envelope of a star from which its light and heat radiate. |
| Chromosphere | a reddish gaseous layer immediately above the photosphere of the sun or another star. Together with the corona, it constitutes the star's outer atmosphere. |
| Corona | the rarefied gaseous envelope of the sun and other stars. |
| Sunspot | a spot or patch appearing from time to time on the sun's surface, appearing dark by contrast with its surroundings. |
| Prominence | a stream of incandescent gas projecting above the sun's chromosphere. |
| Solar Flare | brief eruption of intense high-energy radiation from the sun's surface, |
| Coronal Mass Ejection | significant release of plasma and accompanying magnetic field from the solar corona. |
| Light Year | the distance light travels in one year |
| Parallax | the effect whereby the position or direction of an object appears to differ when viewed from different positions |
| Main Sequence | the location on the H-R diagram where most stars are |
| HR-Diagram | Hertzsprung-Russell diagram, a graph that shows the relationship between a star's surface temperature and absolute magnitude |
| Nebular | the theory that the solar and stellar systems were developed from a primeval nebula. |
| Red Giant | a cloud of gas and dust |
| White Dwarf | A small, hot, dim star that is the leftover center of an old star |
| Nova | a star that gets brighter then fades |
| Neutron Star | A star that has collapsed under its own gravity |
| Pulsar | A spinning neutron star that produces radio waves |
| Black Hole | A star where light cant escape because of the immense gravity that pulls at its surface. |
| Constellations | a group of stars forming a recognizable pattern that is traditionally named after its apparent form or identified with a mythological figure |
| Cosmology | the science of the origin and development of the universe. |
Created by:
LilBrian
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