the ratio of the recessional velocity of galaxies to their distance from the sun, with current measurements of its value ranging from 50 to 100 km/sec per megaparsec.
What’s The #’s Real Name?How do we currently use the # symbol? On Twitter, Facebook, and Instagram, you tag your friends with the @ symbol and you tag topics with the #. If you see something that says “#WordoftheDay,” the tweet or post has something to do with Word of the Day. And, once you click on that marked topic, you’ll likely see all public posts about it. It’s a …
Origin of Hubble's constant
First recorded in 1950–55; after E. P. Hubble
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019