Hubble Constant — Topic Summaries
AI-powered summaries of 3 videos about Hubble Constant.
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How One Supernova Measured The Universe
A dying star in a distant galaxy—SP1149—was predicted to go supernova in November 2015 with striking timing accuracy, and the payoff was more than a...
How We Know The Universe is Ancient
Astronomers can assign a precise “birthday” to the universe—about 13.8 billion years ago—even though no direct relic from the first moments survives....
The Crisis in Cosmology
Cosmology is facing a direct, high-precision standoff over one number that ties the universe’s past to its future: the Hubble constant (H0), the...