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Study guide

Astronomy The study of the moon, stats and other objects in space.
Big Bang Theory The theory that the universe originated in a huge explosion that released all matter and energy.
Doppler Shift Electromagnetic waves such as light and results in either a redshift or blueshift. It has been used to measure the speed at which stars and galaxies are approaching us that is, their radial velocities.
Red Shift A shift in the spectra of distant galaxies toward longer wavelengths.
Blue Shift The displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving towards us
Frequency the number of complete waves that pass a given point in a certain amount of time.
Wavelength The distance between two corresponding parts of a wave
Absolute Brightness The brightness of a star if it were a standard distance from Earth
Apparent Brightness The brightness of a star as it appears from Earth
Cosmic Microwave Background (CMB) Thermal radiation left from the Big Bang
Universe Space and all the matter and energy in it
Galaxy Huge group of single stars, star systems, star clusters, dust, and gas bound together by gravity.
Solar System Sun, planets, and all the other objects that revolve around the sun.
Star A ball of hot gas, it has primarily hydrogen and helium it undergoes nuclear fusion.
Planet An object that orbits a star is large enough to become rounded by its own gravity, and has cleared the area of its orbit
Electromagnetic Spectrum (EM) All the frequencies and wavelengths of the electromagnetic radiation
AU- Astronomical Unit A unit of length used for distances within the solar system
Solar Nebula A large cloud of gas and dust, such as the one that formed our solar system
Gas Giant A large giant that consists mostly of gases in a dense form.
Nuclear Fusion A nuclear reaction in which atomic nuclei of low atomic number fuse to form a heavier nucleus with the release of energy
Convective Zone Region around the sun's radiative zone in which moving gases transfer energy.
Photosphere Surface of the sun
Chromosphere layer of the sun's atmosphere above the photosphere
Corona The outer layer of the sun's atmosphere
Sunspot A dark area of gas on the sun's photosphere that is cooler than the surrounding gases
Prominence A loop of gas that protrudes from the sun's surface, linking parts of sunspot regions
Solar Flare An eruption of gas from the sun's surface that occurs when the loops in sunspot regions connect
Coronal Mass Ejection A large explosion of matter and energy from the sun
Light Year The distance light travels in one year
Parallax The effect 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 lie
HR diagram
Red Giant
White Dwarf
Neutron Star
Black Hole
Created by: tanyah12