hubble's constant
1Hubble's constant — Astron. 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. [1950 55; after E. P. HUBBLE] * * * Constant used to relate the… …
2Hubble's constant — noun (cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the Hubble constant is not actually a constant, but is regarded as measuring the expansion rate today • Syn …
3Hubble's constant — noun alternative spelling of Hubble constant …
4Hubble's constant — /hʌbəlz ˈkɒnstənt/ (say hubuhlz konstuhnt) noun the ratio of the distance between the local group of galaxies and a receding cluster of galaxies, to the rate at which the distant cluster recedes. {from Edwin Powell Hubble, 1889–1953, US… …
5Hubble's law — Physical cosmology Universe · Big Bang …
6Hubble, Edwin Powell — ▪ American astronomer born Nov. 20, 1889, Marshfield, Mo., U.S. died Sept. 28, 1953, San Marino, Calif. American astronomer who is considered the founder of extragalactic astronomy and who provided the first evidence of the expansion of the… …
7Hubble , Edwin Powell — (1889–1953) American astronomer and cosmologist Hubble, who was born in Marshfield, Missouri, was the son of a lawyer. He was educated at the University of Chicago where he was influenced by the astronomer George Hale and, as a good athlete, was… …
8Hubble constant — noun (cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the Hubble constant is not actually a constant, but is regarded as measuring the expansion rate today • Syn …
9Hubble parameter — noun (cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the Hubble constant is not actually a constant, but is regarded as measuring the expansion rate today • Syn …
10Hubble's parameter — noun (cosmology) the ratio of the speed of recession of a galaxy (due to the expansion of the universe) to its distance from the observer; the Hubble constant is not actually a constant, but is regarded as measuring the expansion rate today • Syn …
