Waspie_Dwarf Posted October 27, 2017 #1 Share Posted October 27, 2017 (IP: Staff) · Hubble Observes Exoplanet that Snows Sunscreen Nighttime Titanium Oxide Snow Leaves Dayside Cloud-Free and Cooler Quote Travelers to the nightside of exoplanet Kepler-13Ab should pack an umbrella because they will be pelted with precipitation. But it's not the kind of watery precipitation that falls on Earth. On this alien world, the precipitation is in the form of sunscreen. Ironically, the sunscreen (titanium oxide) is not needed on this side of the planet because it never receives any sunlight. But bottling up some sunlight protection is a good idea if travelers plan on visiting the sizzling hot, permanent dayside, which always faces its star. Visitors won't find any desperately needed sunscreen on this part of the planet. Read More: HubbleSite Link to comment Share on other sites More sharing options...
paperdyer Posted October 27, 2017 #2 Share Posted October 27, 2017 Sounds like we found Mercury's BIG brother. Titanium dioxide is also used in paints for opacity and brightness. It's in many other types of coatings and is used in paper for opacity as in paints. Link to comment Share on other sites More sharing options...
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