One of our planets may be missing, and it could explain why the solar system looks the way it does

Our solar system has two ice giants, Uranus and Neptune, but there may have been a third. According to a new study published ...
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The Solar System May Have Ejected A Fifth Giant Planet – Which Would Explain How Uranus Held Onto Its Moons

Looking at the Solar System, Jupiter and Uranus both have plenty of irregular moons. In supercomputer simulations, the ...