Dating The Universe
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By: Paul S Cilwa |
Posted: 3/24/2026 |
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Page Views: 162 |
| Hashtags: #CosmicDistanceLadder #Parallax #CepheidVariables #Redshift #HubbleConstant #CosmicMicrowaveBackground #StellarEvolution #HertzsprungRussellDiagram #TypeIaSupernovae #AgeoftheUniverse |
| How astronomers measure the age of the universe and its celestial objects, from nearby stars to the edge of everything. |
| Estimated reading time: 8 minute(s) (1674 words) |
In a previous essay,
I wrote about how scientists date things on Earth—bones, pottery,
volcanic ash, the occasional fossilized trilobite. But at some point the
question shifts from "how old is this skull?" to "how old is that star?"
And then, inevitably, "how old is everything?" The methods change
completely, but the detective work is just as layered.