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Hubble Expands Universe Size

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Andromeda nebula

The Conversation

The Conversation

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Science

Science

One large Milky Way galaxy or many galaxies? 100 years ago, a young Edwin Hubble settled astronomy’s ‘Great Debate’

The Conversation

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88% Informative

A century ago , astronomer Edwin Hubble dramatically expanded the size of the known universe.

Hubble’s work opened the door to the study of the universe beyond our galaxy.

Hubble leveraged a discovery made by Henrietta Swan Leavitt 10 years earlier .

The Andromeda nebula, also called M31 , was a prominent example.

Hubble leaked his discovery to The New York Times five weeks before a colleague presented his paper at the astronomers’ annual meeting in Washington , D.C. Hubble’s results suggested the farther away a galaxy was, the faster it was moving away from Earth .

Hubble never figured out that galaxies were moving away because the universe is getting bigger.

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English

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long-living

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47

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