changed how strong the sun over the course of billions of years? Astronomers have discovered a star for the first time, of our central star resembles like an identical twin, but is much older.div
A newly discovered twin star of the Sun shows, according to experts on the future development of our solar system. An international team of astronomers has identified the Brazilian line with the Very Large Telescope (VLT) of the European Southern Observatory ESO far the oldest twin of the sun.
The observed at the Paranal Observatory in northern Chile star HIP 102152 was similar to our sun as an identical twin, but emerged with an estimated age of 8.2 billion years, much earlier, shared the Eso on Wednesday.
This enables the observation of a much later stage of the evolution of stars of the type of our sun, which is only 4.6 billion years old. The first realization was found that the lithium content of the star decreases with the increasing age.
lithium, the third element of the periodic table was created during the Big Bang, together with hydrogen and helium. Astronomers are wondering for many years, why some stars seem to have less lithium than others.
star destroy their lithium over time
The new observations of HIP 102152 astronomers of the solution to this puzzle are now one step closer by found a strong correlation between the age of the solar-type stars and their lithium content have.
Our Sun has now only one percent of the lithium content, which was present in the material from which it originated. Recent studies solar twins suggest that young sun-like stars have a much higher lithium content. Researchers, however, were not yet prove a link between age and the lithium content in the layer.
talawanda Monroe, co-author of the paper reporting, summarizes: “We have found that HIP 102152 has a very low lithium content This shows for the first time clearly that older Sun in Gemini. Indeed, a lower lithium content than our sun or younger solar twins. We can now be sure that stars destroy in any way their lithium when they are older, and that the lithium content of the Sun’s normal for her age. “
“For decades, astronomers look after twin stars of the sun, to better understand our own life-giving star,” said the head of the research group, Jorge Melendez of the Universidade de São Paulo.
When the earthly life ends
From the comparison with the Sun, the astronomers could also see that at the 250 light-years distant star HIP 102152 in the constellation of Capricorn Earth-like rocky planets could include.
scientists predict that our sun will shine brighter ten percent already in a billion years from today. That’s enough for the ultimate climate catastrophe. Temperatures will then be on earth mean of 50 degrees Celsius.
latest move in a few billion years the hydrogen reserves the sun is low. Before the end of life but it will swell again huge, first swallow the planet Mercury, then Venus, and finally the earth.