Humanity has spied more than 5,500 worlds orbiting other stars, and some are truly exotic. One seems to have titanium clouds, while on another, storms of glass might rain down.
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Astronomers have spotted a mysterious exoplanet that orbits its star some 160 light-years away — which has a 350,000-mile-long tail made out of helium gas. The planet dubbed WASP-69B is quite a bit less dense than Jupiter and orbits its star every 3.9 Earth days. Thanks to its close proximity, its surface heats up […]