For Star subscribers: Scientists, including two from Tucson, captured the first direct evidence of an exoplanet being engulfed by its dying star, the same thing that could happen to Earth in 5 billion years.
Henry Brean Earth’s ultimate disaster movie doesn’t come out for a few billion years, but some local astronomers are giving us a sneak peak.
Past observations have found the remnants of such planetary engulfments, but this is the first evidence that appears to show the process as it is happening. Scientists believe they caught one of these outbursts from a dying star about 13,000 light-years away. The telltale signs of a planet skimming into oblivion along the star’s expanding surface were observed for approximately 100 days.
Based on the estimated number of stars and exoplanets in our Milky Way galaxy, such engulfment events probably happen a few times each year, but none have been observed until now. “With these revolutionary new optical and infrared surveys, we are now witnessing such events happen in real time in our own Milky Way — a testament to our almost certain future as a planet,” De said.
“That's more star- and planet-forming material being recycled, or burped out, into the interstellar medium thanks to the star eating the planet,” Lau said.
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