Proxima Centauri

October 11, 2016
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Artists rendering of firey planet with inset indicating gas flow

An artist's illustration depicts the interior of a low-mass star. Such stars have different interior structures than our Sun, so they are not expected to show magnetic activity cycles. However, astronomers have discovered that the nearby star Proxima Centauri defies that expectation and shows signs of a 7-year activity cycle.

Credit: NASA/CXC/M.Weiss