Astronomers have directly observed two worlds beyond our solar system shedding their outer layers into space for the first time. The new observations offer an unprecedented glimpse into the interiors of planets — a view that has long remained elusive, even for Earth.
The first “disintegrating” exoplanet is a Neptune-size rocky world called K2-22b, which zips around its star so closely that it completes an orbit in just nine hours. Scientists say the star’s heat literally roasts the planet: K2-22b’s surface reaches temperatures of more than 3,320 degrees Fahrenheit (1,826 degrees Celsius), which is hot enough not just to melt rock, but to vaporize it. Recent observations of K2-22b using the James Webb Space Telescope (JWST) revealed that the evaporated rock has been sculpted into an extended, comet-like tail.
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