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The Milky Way [c] is the galaxy that ... [133] [134] [135] Measurements using the Very Long Baseline Array in 2009 found velocities as large as 254 km/s (570,000 mph) ...
The galactic year, also known as a cosmic year, is the duration of time required for the Sun to orbit once around the center of the Milky Way Galaxy. [1] One galactic year is approximately 225 million Earth years. [2]
The centre of the Milky Way is about 26 000 light-years away. [35] [36] 1 × 10 5 ly: The Milky Way is about 100 000 light-years across. 1.65 × 10 5 ly: R136a1, in the Large Magellanic Cloud, the most luminous star known at 8.7 million times the luminosity of the Sun, has an apparent magnitude 12.77, just brighter than 3C 273. 10 6: 2.5 × 10 6 ly
The proper distance represents the distance obtained as if one were able to freeze the flow of time (set = in the FLRW metric) and walk all the way to a galaxy while using a meter stick. [2]
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Galactic Centre of the Milky Way: 1 700 000 000 — Distance from the Sun to the centre of the Milky Way — Note: Figures in this table are generally rounded estimates, often rough estimates, and may considerably differ from other sources. Table also includes other units of length for comparison.
Citizen scientists spotted an object zipping through the Milky Way at more than 1 million miles an hour, and a new study shows it could be a rare hypervelocity star.
The Milky Way started out small and grew in size as it merged with other galaxies, gaining stars as well as hydrogen to form more stars. Each galaxy has hydrogen gas that aids in the birth of stars.