The echo of the Big Bang in galaxies
2005/03/01 Elhuyar Zientzia Iturria: Elhuyar aldizkaria
The tiny fluctuations in the density of matter after the Big Bang are reflected in the position of galaxies in the Universe. Two groups of astronomers have reached this conclusion. His research seems to confirm theories on how the universe went from being uniform to being a set of galaxies and stars.
The Universe is believed to be due to the Big Bang, while theorists calculated that galaxies appeared there where a small matter was collected in the 1960s.
NASA has been able to detect these fluctuations of matter in microwave background radiation in the years 1992 and 2003. But this radiation occurred shortly after the Big Bang, long before galaxies were formed.
Now, two sky observers have detected traces of fluctuation between two galaxies that formed 10 billion years after the Big Bang. According to this, there is a direct relationship between the instability that existed at the beginning of the Universe and the organization we see today in the cosmos.
One of these observers is the Anglo-Australian telescope in Australia, which for ten years has studied 221,000 galaxies. The other, located in the United States, in New Mexico, has observed for six years 46,000 galaxies in the northern hemisphere. Both have gathered the data obtained and hence the conclusions.
In addition to analyzing the reflection of the echo of the Big Bang in the location of galaxies, astronomers have calculated the amount of matter in the Universe. Apparently, the matter formed by atoms and subatomic particles represents only 18% of the total mass. The rest is dark matter.
