Friday, January 12, 2018

the Telescope that changed the way we see the universe

and NASA has a free ebook /pdf for you

It is named for astronomer Edwin Hubble.

Hubble's revolutionary work includes finding a constant relationship between galaxies' redshift and distance, which helped to eventually prove that the universe is expanding. Additionally, a classification system that he created for galaxies has been used by other researchers for decades, now known as the Hubble sequence.

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