Lund Astronomers Believe Planet 9 Was an Exoplanet

New research details how Planet 9 may have once been an exoplanet “captured” by our sun billions of years ago. Through a computer-simulated study, astronomers at Lund University in Sweden show that it is highly likely that the so-called Planet 9 is an exoplanet. This would make it the first exoplanet to be discovered inside […]
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