Archivi tag: legge di Hubble

Dai paradossi della cosmologia a nuove idee sull’Universo

Alcune semplici osservazioni del mondo che ci circonda sembrano contraddire le leggi della fisica. Risolvere questi paradossi potrebbe cambiare il modo con cui comprendiamo l’Universo.

Continua a leggere Dai paradossi della cosmologia a nuove idee sull’Universo

Origins of the Expanding Universe: 1912-1932

On September 17, 1912, Vesto Slipher obtained the first radial velocity of a “spiral nebula” – the Andromeda Galaxy. Using the 24-inch telescope at Lowell Observatory, he followed up with more Doppler shifts, and wrote a series of papers establishing that large velocities, usually in recession, are a general property of the spiral nebulae. Those early redshifts were recognized as remarkable by Slipher, and were critical to the discovery of what came eventually to be called the expanding Universe. Surprisingly, Slipher’s role in the story remains almost unknown to much of the astronomical community. Continua a leggere Origins of the Expanding Universe: 1912-1932