Roughly 400 light years from Earth, a young star named TOI 451 travels within a river of stars. An international team of astronomers has now found three previously unknown exoplanets orbiting that star. The Pisces-Eridanus stream of stars was only recently discovered — at the end of 2018 — despite stretching across one-third of the sky. Stars within this stream average only around 3% of the age of our own solar system. “This system checks a lot of boxes for astronomers. It’s only 120 million years old and just 400 light-years away, allowing detailed observations of this young planetary system. And…
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