Explore: Hubble Constant

coordinate. Though the Hubble constant H0 is constant at any given moment in time, the Hubble parameter H, of which the Hubble constant is the current value

Edwin Powell Hubble (November 20, 1889 – September 28, 1953) was an American astronomer. He played a crucial role in establishing the fields of extragalactic

{\displaystyle H_{0}} is the Hubble constant. The surface of a Hubble sphere is called the microphysical horizon, the Hubble surface, or the Hubble limit. More generally

universe. These two methods give slightly different values for the Hubble constant, which is then used in a formula to calculate the age. The range of

indicating the present, the Hubble constant, H 0 = H ( t = 0 ) {\displaystyle H_{0}=H(t=0)} , is the present day value of the Hubble parameter, H ( t ) {\displaystyle

The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the

the late 1980s: in particular, the model required a value for the Hubble constant lower than preferred by observations, and the model under-predicted

Canadian-American astronomer, best known for her measurement of the Hubble constant, and as director of the Carnegie Observatories in Pasadena, California

Douglas Hartree Hubble constant – Edwin Hubble Josephson constant – Brian David Josephson Kaprekar's constant – D. R. Kaprekar Kerr constant – John Kerr Khinchin's

Edwin Hubble confirmed that the universe was expanding. From the 1930s until the late 1990s, most physicists thought the cosmological constant to be zero