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Hubble found that the recessional velocity of a galaxy is proportional to its distance. The proportionality constant is called the Hubble constant. It's a bit
by mr_mitm 1y ago
Hubble found that the recessional velocity of a galaxy is proportional to its distance. The proportionality constant is called the Hubble constant.
It's a bit of a misnomer though, because it's only constant through space, not time. At the time of discovery it was assumed to be constant in time, too.
- binarymax 1y agoThanks that makes sense. Strange why pop science articles don’t explain this critical point. I probably should have looked it up.
- hnaccount_rng 1y agoThe irony of course being that Hubble's original data is, at least in modern scientific analysis, very well compatible with "no expansion". There is _a lot_ of community flavour involved in how we talk about measurement results