6/7/2023 0 Comments Edwin hubble![]() One of the goals of the Hubble Space Telescope, named for Edwin Hubble, was to determine H o, which it was able to do through years of observation and data. One of the ongoing controversies surrounding Hubble’s Law is determining Hubble’s constant, Ho. (Receding velocity is how fast the galaxy is moving away from us.) We can determine a galaxy’s receding velocity by its redshift- most of the time . The law states that the more distant a galaxy, the greater the redshift. The third contribution is Hubble’s formulation of the redshift distance law in 1929, better known as Hubble’s Law. Hubble’s classification led to his Hubble Galactic Tuning Fork or Hubble Sequence - how he thought galaxies evolve. He classified these based on shapes: elliptical, spiral, and irregular, called a galaxy’s visual morphology. Second, Hubble was the first to classify galaxies based on what he observed, from 1922 to 1923. Yet Hubble’s observations of Cepheid variables in these galaxies and comparing them to Cepheids in the Milky Way led him to his controversial conclusion. This contradicted the view at the time the Milky Way was considered the Universe. Wilson Observatory in California, he demonstrated that some of these nebulae, like the Andromeda nebula, were actually objects – galaxies – far beyond our Milky Way galaxy. First Contributionįirst, using the new 100-inch telescope at Mt. Wilson observatory in 1919, studying cloudy patches called nebulae.Īmerican astronomer Edwin Hubble made three major contributions to the field of galactic astronomy. ![]() Wilson ObservatoryPublic Domain | Image courtesy of NASA.Įdwin Hubble was hired to work at the new Mt. Hubble deserves the credit for the discovery of the expansion, even though papers by Georges Lemaitre and H. 157 Hubble’s Major Contributions California Institute of Technology, Mt. apparent radial velocities of nebulae, but primarily by Edwin Hubbles estimates of distances to nearby galaxies.
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