This is the second circumbinary multiplanet system astronomers have found. There should be many more, but they're hard to find.
A summer intern at NASA’s Goddard Space Flight Center found the first planet around the binary in 2017. TOI 1338 b is a circumbinary planet with about 33 Earth masses and is in between Saturn and Neptune in size. It’s on a 95-day orbit around the binary stars.
Because of TOI 1338 b’s inclination, from our perspective, it will stop transiting in front of its star in November 2023. Then in about 2031, we’ll see the transits again. ” It’s been accepted for publication in Nature Astronomy and is available on arxiv.org. The lead author is Matthew R. Standing, a Ph.D. student at the School of Physics and Astronomy, University of Birmingham, UK.
Now we know of 12 circumbinary planets, and two of them are in multiplanet systems. The first multiplanet circumbinary system astronomers found is called Kepler-47, and it hosts three known explanets. The BEBOP observing program is designed to uncover more circumbinary planets and find out more about them. Its main goal is to find more of them, and it’ll do that by overcoming some of Kepler’s observational biases.
“If we are to unveil the mysteries of circumbinary Tatooine-like exo-atmospheres, the TOI-1338/BEBOP-1 system provides a new hope.”Finding another multi-planet circumbinary system and determining their masses is an important discovery. While these systems up-end some parts of the models for how planets form, they’ll ultimately make our models more accurate.
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