2 janv. 1888 av. J.-C. - Edwin Hubble dwin Powell Hubble (November 20, 1889 – September 28, 1953)[1] was an American astronomer. He played a crucial role in establishing the fields of extragalactic astronomy and observational cosmology.[2][3] Hubble proved that many objects previously thought to be clouds of dust and gas and classified as "nebulae" were actually galaxies beyond the Milky Way.[4] He used the strong direct relationship between a classical Cepheid variable's luminosity and pulsation period[5][6] (discovered in 1908 b
Ajouté au bande de temps:
Date:
2 janv. 1888 av. J.-C.
Maintenaint
~ Il y a 3916 ans