The distance between similar points on a wave

how fast the wave is moving

bottom of the wave

top of the wave

objects moving away from Earth appear to have a stretched out red wavelength

objects moving toward Earth appear to have a compressed blue wavelenth

classification of wavelengths

a graph used by astronomers to classify stars by brightness and temperature

the relative brightness of an object

a cloud of dust and gas that when compressed can form new stars

how simple or detailed something is

the distance that light can travel in one year

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