receding galaxies
What receding galaxies means in Physics GCSE, as defined for AQA.
Definitions of receding galaxies
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Reference: AQA
Galaxies moving away from us, shown by red-shift observed in almost all galaxies, while a few nearby galaxies are blue-shifted because they are approaching.
Galaxies moving away from us, where the further away a galaxy is, the faster it is moving.
Topics that use receding galaxies
- Red-shift (physics only) (AQA GCSE)
Related terms
- absorption line spectra
- accelerating expansion
- dark energy
- dark mass and dark energy
- expanding universe
- increase in wavelength
- measuring distance
- red end of the spectrum
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