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Sunscreen 'snow' falls on scorching-hot alien planet

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Alexander Ruper
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The weirdness of exoplanets continues to amaze.

It snows titanium dioxide, one of the active ingredients in sunscreen, on one giant, scorching-hot alien world, a new study suggests.

Astronomers used NASA's Hubble Space Telescope to study Kepler-13Ab, a planet that's six times more massive than Jupiter and that lies 1,730 light-years from Earth.

[Hubble in Pictures: Astronomers' Top Picks (Photos)]

Kepler-13Ab is very close to its host star, completing one orbit every 1.8 Earth days.

As a result, the planet is one of the hottest worlds known, with a dayside temperature of nearly 5,000 degrees Fahrenheit (2,760 degrees Celsius), researchers said.

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