What is Hubble's law?

The Hubble Law is a description of the observation of Edwin Hubble in 1929. Hubble noted that objects in space seemed to be separated from each other and that the further the galaxy was from the observer, the faster it moved. This observation is used as a basis for the Hubble constant, an estimate of the degree of expansion of the galaxy, which is an important concept in cosmology, which is used to support a number of discussions about the nature of the universe. In fact, the Hubble constant is better called the "Hubble variable" because it is time dependent. Redshift, the result of the Doppler effect that causes a change in the wave when the emitting object moves to the observer is a shift in the spectrum of light emitted by the galaxy towards the red end of the spectrum. There is a red shift when the galaxy moves in relation to the observer. The galaxies leading to the observers are subject to what is called blueshift, with a light heading towards the blue end of the spectrum.

Hubble's observation led him to understand that the galaxies had moved away from each other, and that the galaxy was further, the faster he moved. This is the basis of Hubble's law and the discontinuation of the expanding theory of the universe. It is important to realize the fact that this phenomenon can be observed from anywhere in the universe. The universe, as it turned out, has a large amount in common with poppy -semine: as the universe/muffin expands, the galaxy/poppy inside move apart.

Hubble law is sometimes expressed by the following equation: v = h _{0 d. The equation reflects the relationship between the speed, determined by spectroscopy; Hubble Constant, reflecting expansion, which occurs across the universe; and distance. Cosmologists have reached several different values ​​for Hubble constant. It is assumed that the most accurate values ​​were determined with the help of a famous telescope named after Hubble. The Hubble Constant is considered to be about 74 kilometers per second for each megaparsec at a distance.}

speed and distance cannot be measured directly. This means that the data occurred with the help of Hubble's law could be wrong. In fact, there are brisk arguments since 1929 on Hubble's law and its consequences for the nature of the universe.