All Things Space, UFOs, etc.The Closest Solar System to Earth is Even Weirder Than We Thought Posted on July 25, 2025 by Administrator Since 2016, astronomers have known that the solar system next door to ours—a triple-sun system—has one planet, Proxima b, located in the so-called habitable zone. Now a group of researchers led by Mario Damasso from the National Institute for Astrophysics in Italy claims to have discovered a second planet called Proxima c, a super-Earth with nearly two times the mass of Earth.