Astronomers say that the universe contains three times more stars than they expected. Their contention is based on the new observations, which show that the structure of many galaxies is significantly different from the device Milky Way.
In the journal Nature, the researchers said that a larger number of stars indicates a greater number of planets, and hence the existence of "trillions" (10 with eighteen zeros) of planets like Earth.
Yale University study conducted in the WM Keck Observatory in Hawaii.
The scientists found that older galaxies contain 20 times more red dwarf stars, compared with younger counterparts.
Red dwarfs are smaller and dimmer than our sun. Telescopes are powerful enough to detect them have been opened recently.
As the Yale professor Pieter van Dokkum, who led the study, the number of planets is also larger than we thought, and this increases the probability of the existence of other habitable planets.
"There is perhaps trillions of planets such as Earth, orbiting their stars," - he said. "The age of a typical red dwarf is 10 billion years old - more than enough time for the development of complex life on planets around them.’s One of the reasons why we are so interested in the stars of this type."
The discoveries also help to explain a phenomenon that astronomers call the "missing mass" in the universe.
The movement of galaxies suggests that the matter in space is more than can be observed. Therefore put forward the theory of the invisible "dark matter".
Dr Marek Kukula of the Royal Observatory in Greenwich, UK, said: "This discovery means that we do not need as much dark matter to explain the appearance and behavior of the universe."
"It also talks about how the very first galaxies formed from the gas remaining after the Big Bang."
Dr Robert Massey of the Royal Astronomical Society said: "The discovery of red dwarfs in other galaxies - it is very impressive and shows how advanced the latest generation of telescopes."
"If these stars are more common in elliptical galaxies than in the Milky Way like arranged, it is agreed with the idea that they contain a greater number of older stars than we are. Lifespan of red dwarfs are much higher than that of our sun." Popular news articles of science and technology only on our website.