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Brian Hernandez ESPS

Astronomy

TermDefinition
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