The theory used to determine these very great distances in the universe is based on the discovery by Edwin Hubble that the universe is expanding. However, in 1917, the idea that the universe was expanding was thought to be absurd. Several scientists had also posed this theory, based on Einstein’s Theory of General Relativity, but Hubble's data, published in 1929, helped convince the scientific community. Astronomer Edwin Hubble revolutionized the field of astrophysics. Edwin Hubble first proposed this law in 1929 based on a study of the light received from the distant galaxies.

So Einstein invented the cosmological constant as a term in his General Relativity theory that allowed for a static universe. He observed that the characteristic colors, or spectral lines (see spectrum spectrum, arrangement or display of light or other form of radiation separated according to wavelength, frequency, energy, or some other property. Some years later, in 1925, the American astronomer Edwin Hubble stunned the scientific community by demonstrating that there was more to the universe than just our Milky Way galaxy and that there were, in fact, many separate islands of stars - thousands, perhaps millions of them, and many of them huge distances away from our own. W 1929 roku, po wielu żmudnych i skrupulatnych pomiarach, stwierdził on, że widmo danej galaktyki jest tym bardziej przesunięte ku długim falom czerwonym, im … The Big Bang model was a natural outcome of Einstein's General Relativity as applied to a homogeneous universe. Edwin Hubble. Edwin Hubble in “The Observational Approach to Cosmology” admits that his observations prove a small uniform, symmetrical, constant universe, that centers around earth. This he struggles to overcome throughout his entire lecture, trying to come to an alternative conclusion through assumptions, purposely disregarding the facts.

Using the 100-inch (254-cm) reflector at the Mount Wilson Observatory, in 1923 Hubble identified a Cepheid variable star in the Andromeda Nebula.

Trained initially as a lawyer, Edwin Hubble moved to astronomy in 1914, working at the famous Yerkes Observatory near Chicago. In 1929, Edwin Hubble announced that almost all galaxies appeared to be moving away from us. From this he was able to … He went on to have a profound influence on … Prawo Hubble’a–Lemaître’a (dawniej prawo Hubble’a) – podstawowe prawo kosmologii obserwacyjnej, wiążące odległości galaktyk r z ich tzw. prędkościami ucieczki v (których miarą jest przesunięcie ku czerwieni z).Prawo to określa, iż te dwie wielkości są do siebie proporcjonalne, a stałą proporcjonalności jest stała Hubble’a H 0:

American astronomer Edwin Hubble was the most influential observer of his generation. Edwin Hubble był astronomem, ale jego odkrycie miało ogromne konsekwencje dla fizyki, a szczególnie jej działu - kosmologii.

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