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NASA’s TESS found 3 exoplanets orbiting a young sun-like star

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 because there are three planets between two and four times Earth’s size, they make especially promising targets for testing theories about how planetary atmospheres evolve,” explains Dr. Elisabeth Newton of Dartmouth College.