I may be being slightly facetious. Kepler-13Ab is an exoplanet 6 times more massive than Jupiter, orbiting so close to its star it completes one orbit in 1.8 days. It's one of those hot Jupiters that are very easy to find because they're big and close to their star, thus making the most dramatic impacts for our telescopes to find. Either they make the star wobble a bunch due to their gravity, or in this case since it's a Kepler planet, as Kepler-13Ab passes in front of its star, the light from the system dips significantly.
These hot Jupiters are not nice places. You're looking at daytime temperatures in the thousands of degrees, and the clouds rain metal. Kepler-13Ab is among the hottest of the exoplanets, with temperatures of 5,000 degrees, but don't worry too much if you find yourself suddenly transported there, you'll be okay, because instead of metal rain, it snows sunscreen.
Okay, technically, it's titanium dioxide, but that's the active ingredient in sunscreen! So you may be instantly roasted and incinerated, but at least you get won't get sunburnt. What a relief, right?
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