Progress Donasi Kebutuhan Server — Your Donation Urgently Needed — هذا الموقع بحاجة ماسة إلى تبرعاتكم
Rp 1.500.000 dari target Rp 10.000.000
astronomer Vesto Slipher had measured: Described, eg, in Van den Bergh 1997.
Arthur Eddington listed those: Eddington 1923, p. 162.
Georges Lemaître published (in French) a remarkable paper: Lemaître 1927.
from brightness measurements by Hubble: Hubble 1926.
Edwin Hubble obtained a value: Hubble 1929a.