Astronomers say the universe in its infancy, was born stars rapidly, but the emergence of new stars is now a much lower, and is not expected to change this in any time soon, according to the site "popular Science" competent scientific news.
For the first time astronauts can estimate the rate of emergence of new stars in the universe, and found that the emergence of at least an average of 30 times what was likely before about 11 billion years old. On this basis, all the stars that will arise in the future will not increase by more than 5% of what currently exists.
The astronomers found these estimates to take photographs of the universe at ages 2, 4, 6 and 9 billion years (the age of the universe is 13.7 billion years old, as scientists say), and the result showed a clear decrease in star formation activity.
He took a team of astronomers led by David Sobral of Leiden Observatory in the Netherlands, the study of the hydrogen emission line - cosmic alpha, which is a reliable indicator of star formation.
The scientists used to cover a huge sector of the sky several telescopes are the Japanese Subaru telescope and infrared telescope located in the British Mauna Kea on the island of Hawaii, and the huge telescope located in northern Chile, consisting of four telescopes.
The area included surveillance of this group the largest samples of the sky at all, and is the largest of more than ten times that of any previous sample. The team watched the universe at different ages and at different distances, using the same monitoring technology, providing an accurate comparison.
The team found that half of the stars are currently formed by more than nine billion years ago, and it took two billion years to pose all. The other half Vaanaj to five times the previous time to pose. According to astronomers, if the trend continues this way, the universe will not generate more than 5% of new stars, even if we waited forever.
Sobral said in a statement, "We live very clearly now in a universe dominated by old stars .. all the activities in the universe appeared billions of years ago."
He explained that "the method the one who used to track and study galaxies revealed a steady decline in star formation over the past 11 billion years. Using this method and date of star formation in the universe can predict the mass College of stars and their distribution in the universe, and this prediction fully consistent with measurements independent."
