How fast is the Universe really expanding? Multiple views of an exploding star raise new questions

Different measures of the rate of the Universe’s expansion give different results – and a new measurement technique only makes matters more complicated.

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Adam Riess ,Edwin Hubble ,Patrick Kelly ,Henrietta Leavitt ,University Of Minnesota ,Cepheid ,Hubble Space Telescope ,Cosmology ,Gravitational Lensing ,Supernova ,Universe ,