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Astronomy on MSN3d
How did Edwin Hubble prove Andromeda was a galaxy?Particular stars called Cepheid variables allow astronomers to determine distance, and Hubble spotted one of these within M31 ...
Hubble Space Telescope images of V1 (inset), which was the Cepheid variable star in the Andromeda spiral that allowed Edwin ...
Digital Camera World on MSN1d
Happy Birthday Dr Edwin Hubble! 135th anniversary of the astronomer who gave his name to the Hubble Space TelescopeDr Edwin Powell Hubble, who lends his name to the iconic Hubble Space Telescope, was one of the leading astronomers of the ...
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