How do we know the Universe is expanding?
April 27, 2017
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5:33Now PlayingHow do we know the Universe is expanding?
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as posted by the channelCosmological redshift was our first clue the universe was expanding. A century ago, Edwin Hubble discovered galaxies outside our own supercluster are all moving away from us. But how do we get from redshift to an expanding universe? That's the tricky part and most people get it wrong.
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VIDEO ANNOTATIONS/CARDS
Is The Universe Infinite:
What is the Universe expanding into?
How Do We Know Things About Stars?
What the HECK is Light?!
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RELATED YOUTUBE VIDEOS
PBS Space Time on Cosmological Redshift:
PBS Space Time on the CMB:
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** Andy Kirkham, Nikko Lai, Clint Cloys, Evgeny, Rick Finn, Preston From, Christian McCracken **
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LINKS TO COMMENTS
Expanding? - seastormsinger:
Redshift - Yair Eshel Cahansky:
FLOWER Metric - Guest Informant:
List of Topics - aThrasheR:
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Cosmic Microwave Background:
Spectroscope at Lick Observatory:
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