Video: Zeroing in on Hubble's constant

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In the early part of the 20th Century, Carnegie astronomer Edwin Hubble discovered that the universe is expanding. The rate of expansion is known as the Hubble constant. Its precise value has been hotly debated for all of the 80 intervening years. The value of the Hubble constant is a key ingredient in determining the age and size of the universe.

More information at: http://www.ciw.edu/news/zeroing_hubble_s_constant

This video is a production of the Carnegie Institution for Science
Views: 1,825
Added: 10 years ago.

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