Results 171 to 180 of about 114,518 (203)

Hubble’s constant and rotational deceleration

Lettere Al Nuovo Cimento Series 2, 1973
It is noted that the astronomical evaluation of the Hubble constant has tended to decrease, the latest value being about 1.6 x 10/sup -18//s. Fossil evidence on the Earth--Moon-- Sun system is presented which may provide a lower bound on that constant. (WDM)
D. H. Weinstein, J. Keeney
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Measuring the Hubble Constant

Physics Today, 1986
Hubble's celebrated constant, which relates the recessional velocities of galaxies to their distances, is perhaps the most important number in extragalactic astronomy. Using it, along with their favorite models, astronomers and cosmologists derive the age of the universe, estimate its size, calculate the luminosity of quasars and much more ...
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Hubble’s Constant

Abstract Einstein believed that any valid solution of his gravitational field equations would demand a universe with matter, but Dutch theorist Willem de Sitter disagreed. He devised an ‘empty’ solution which, although artificial, was still capable of providing physical insight.
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Should Hubble's constant be doubled?

Nature, 1978
LYNDEN-BELL1 has argued that Hubble's constant H0 should be doubled, from its present notional value of 55 km s−1 Mpc−1 to 110 km s−1 Mpc−1. He claims that with this value of H0 the apparent superluminal expansions in compact radio sources can be explained in a more consistent manner than previously, by means of his model of the expansion based on the ...
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The Hubble Constant: A Discourse

Publications of the Astronomical Society of the Pacific, 1996
Multiple evidence is compiled and discussed that the large-scale value of the Hubble constant must lie within the range of 45 < H0 < 65.
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The Hubble Constant and HST

2009
The Hubble diagram of distant type Ia supernovae, zero-pointed by nearby SNe Ia with Cepheid distances from HST observations yields H 0=62.3. The basis of this value has been weakened because the period–luminosity relation of Cepheids is not universal, but depends on their metallicity and possibly other parameters. An independent (Pop.
G. A. Tammann, A. Sandage
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A buyer’s guide to the Hubble constant

Astronomy and Astrophysics Review, 2021
Paul Shah, Pablo Lemos, Ofer Lahav
exaly  

Constraints on the Hubble constant from supernova Refsdal’s reappearance

Science, 2023
Patrick L Kelly, Steven A Rodney, Tommaso Treu   +2 more
exaly  

A two per cent Hubble constant measurement from standard sirens within five years

Nature, 2018
Hsin-Yu Chen, Maya Fishbach, Daniel E Holz   +2 more
exaly  

Determining the Hubble constant from gravitational wave observations

Nature, 1986
Bernard F Schutz
exaly