Mmastodon ScienceScience first seen 18 h ago, last 2 h ago, peak #3
Why the 'Hubble constant' isn't actually constant
Original: The cosmic expansion rate changes with time, but we call it "the Hubble constant." If one specific condition is true, it
Cosmologists are revisiting a familiar naming quirk: the universe's expansion rate has changed over cosmic history, yet it is still called the Hubble constant. The current value only becomes truly constant far in the future if one condition holds — dark energy behaves like a cosmological constant — and if so, no observer could ever distinguish that era from today's measurements.
Why now: A physics writer's point about the misleading name of the Hubble constant is resonating with space enthusiasts online.
Hubble constantBig Thinkuniverse
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Evidence
- The cosmic expansion rate changes with time, but we call it "the Hubble constant." If one specific condition is true, it will, one day, become a constant. But no one will be able to tell https:// bigthink.com/starts-with-a-ban… · HollyCo26588808@universeodon.com · 4
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