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Earth Science

Vocab Terms

TermDefinition
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
Created by: corinna_28