Galaxies and Cosmology
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G
Galactic YearThe time taken for the Solar System to orbit once around the centre of the Milky Way. | |
GalaxyA massive system of stars, gas, dust, planets, and dark matter held together by gravity. | |
Galaxy clustera large gravitationally bound collection of galaxies. | |
Galaxy rotation curvea graph showing orbital speed at different distances from a galaxy's centre. | |
Gravitational lensingbending of light caused by gravity. | |