. HD 167768 b “helps to answer some of these questions about what happens to planets when their host stars become giants.”There are other curiosities about HD 167768 b, too—it’s in a strange part of the galaxy for a planet to exist. Our Milky Way is shaped like a crepe stuffed within a fluffy pancake, where the crepe is known as the thin disk and the pancake is the. The stars in the thick disk tend to be much older, and are thought to be less favorable environments for planets to grow up around.
This curious world also shows signs that it’s not alone. HD 167768 b was discovered via the tried-and-truewhere astronomers measure the movement of a star to infer hidden planets. The team noticed two more possible planet signals in the data, hinting at neighboring planets orbiting a bit further away from the star—they would have years 41 and 95 Earth-days long. To find out if these neighbors are real, astronomers will need to take a closer look at this system, such as with the.
We don’t have forever to watch HD 167768 b, though. Teng and collaborators calculate that this planet will only exist for 150 million more years—an absolute blink of the eye for the timescales of the universe. This is an exciting opportunity to see a planet so close to the end of its existence. “Cosmically, this is just about the last possible time we’ll be able to study the planet,” says Brande. “As the host star is continuing to expand, eventually it will totally eat this planet for dinner.”
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