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12 cards from this deck
Light from galaxies stretched towards red end of spectrum
When galaxies are moving away from Earth
Amount of redshift increases with distance of galaxy
Universe is expanding
Start of Big Bang
Dots on balloon surface
Distance between galaxies increases
Gets stretched
Wavelengths appear longer, shift towards red end
Frequency of light appears to decrease
Each wave emitted from position further from observer
Universe has been expanding since the Big Bang
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