The planets risk being swallowed up by the stars they orbit.
"These discoveries are crucial to understanding a new frontier in exoplanet studies: how planetary systems evolve over time," Grunblatt said in the Keck statement."These observations offer new windows into planets nearing the end of their lives, before their host stars swallow them up.". In turn, altering the planets' orbit around a parent star could destabilize an entire planetary system or cause the planets to collide as they get closer to each other.
Observations of TOI-2337b, TOI-4329b and TOI-2669b also revealed that the three exoplanets have some of the shortest orbits yet discovered around subgiant or giant. For example, the orbital period of TOI-2337b suggests the exoplanet will be consumed by its host star in less than 1 million years, which is sooner than any other known planet, according to the study.
"We expect to find tens to hundreds of these evolved transiting planet systems with TESS, providing new details on how planets interact with each other, inflate and migrate around stars, including those like our sun," Nick Saunders, co-author of the study and graduate student at the University of Hawaii Institute for Astronomy said in the statement.
Therefore, studying planetary systems like TOI-2337b, TOI-4329b and TOI-2669b may provide a better understanding of our own
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