Astronomers have spotted four sub-Earth exoplanets orbiting the closest single-star system to us, called Barnard's Star. As detailed in a new paper published in the journal The Astrophysical Journal Letters, an international team of researchers discovered that the star — a small red dwarf star just 16 percent of the Sun's mass and just under six light-years from Earth in the constellation Ophiuchus — has four tiny and rocky worlds orbiting it. According to the astronomers, these exoplanets, among the smallest ever discovered, could force us to reevaluate our existing understanding of how planets form and evolve. The findings could also […]

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