For the first time, astronomers have seen a star in the act of eating a planet.
One event from 2020 stood out. A spot of light rapidly got about 100 times as bright as it had been. It could have been the result of two stars merging. But a second look by NASA’s NEOWISE infrared space telescope suggested otherwise.
Planet-devouring stars are probably relatively common in the universe, says UCLA astrophysicist Smadar Naoz, who was not involved with the study. But the evidence, she says, has been circumstantial. Until now, astronomers have seen only signs of stars preparing for a planetary snack or debris left over from a presumed stellar meal.
Naoz has pondered the ways that stars might gobble up planets. A star in the prime of life might consume a planet that wanders too close by in its orbit — think of that as a stellar lunch, Naoz says. A dying star, on the other hand,Subscribe to Science NewsThe planet-eating star in this study is turning into a red giant, but is still early in its transformation. “I would say it’s early supper,” Naoz says.
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