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Measuring the Universe With a 14 Billion Light-Year Ruler

Since the time of the ancient Greeks, scientists have been constructing a cosmic measuring tape to measure the universe from our own backyard all the way to its ever-expanding edge: the cosmic distance ladder

2024-04-10 19:00:00 - Be Smart

In this video, we climb that ladder and explore how each rung has revealed something new and previously unthinkable about the universe we live in.


00:00 - How far away are things?

01:05 - Near, far, parallax that star

03:25 - Island universes and Hubble's blinking star

05:51 - Redshifted rainbows and the expanding universe

07:41 - Supernovae and the end of everything

09:08 - Conclusion: The ladder of discovery

10:00 - I'm hosting a game show!

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