Astronomers have discovered the oldest known Earth-size planets ever, in a star system that's nearly 11.2 billion years old. According to astronomers say this detection proposes that life could have existed throughout almost all of the universe's 13.8 billion-year history. The five Earth-size planets were spotted through an investigation of data from NASA's Kepler space telescope, which detects differences in starlight as planets cross a star's disk. In this scenario, the star lies about 117 light-years from Earth and is 25 percent even smaller than host star. It's recognized as Kepler-444. Scientists used a method called aster seismology, which processes minute oscillations in a star's intensity, to conclude Kepler-444's exciting age. The size of the planets range between Mercury and Venus, but they all orbit Kepler-444 inside the orbit of Mercury in our own solar system. That would make them too hot to be livable by life as we know it. Nonetheless, the point that such planets could occur so early in the universe's past proposes that life-friendly spheres could exist for billions of years.
Analysis of the Kepler data exposed more than 30 oscillation frequencies in the parent star. By means of these frequencies, the oldness of Kepler-444 was pointed down to 11.2 +/- 1-billion years. As we all know that according to cosmology dating, the big bang occurred 13.8 billion years, this means that the Kepler-444 planets were formed when the universe itself was only one fifth of its present age. Tiago Campante of the University of Birmingham, also the main author of a paper issued by The Astrophysical Journal, in a news release, said "There are far-reaching consequences for this remarkable finding"
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