The Universe — Core Learning Objectives
Note
- Know that the Milky Way is one of many billions of galaxies making up the Universe and that the diameter of the Milky Way is approximately 100 000 light-years
- Describe redshift as an increase in the observed wavelength of electromagnetic radiation emitted from receding stars and galaxies
- Know that the light emitted from distant galaxies appears redshifted in comparison with light emitted on the Earth
- Know that redshift in the light from distant galaxies is evidence that the Universe is expanding and supports the Big Bang Theory
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