Mini Neptunes

Some Earthlike alien worlds may have looked a lot more like miniature versions of Neptune when they were born. Frigid "mini-Neptune" exoplanets that take shape relatively far from red dwarfs — stars smaller and dimmer than the sun — could be dragged inward over time, eventually losing most of their thick gaseous atmospheres and ending up in spots warm enough for life as we know it to survive, a new study suggests. Such stripped, rocky "habitable evaporative cores" (HECs) may be common around red dwarfs, which make up about 75 percent of all stars in the Milky Way galaxy, researchers said.


Kemo D. 7

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