Allan Sandage died at 84. For decades, Sandage maintained a controversy with Gerard De Vaucouleurs about the size of the universe. Sandage put the Hubble constant at about 55 (km/s/Mpc), De Vaucouleurs put it at 90. In 1979, a group with Marc Aaronson published new data from their satellite radio measurements. Everybody thought this would resolve the controversy, but Aaronson c.s. found 75, which at the time was within the limits of everybody else's data. Sandage did not have to adjust his value of the Hubble constant.
Today, the Hubble constant is supposed to be around 72 (km/s/Mpc).
No comments:
Post a Comment