NASA's Hubble Spots a Heavy Metal Jupiter Where It Rains Liquid Gems

An anonymous reader shares a report: The exoplanet WASP-121b, which resides about 900 light-years from Earth, is an egg-shaped scorcher. Temperatures on the planet's day side can reach up to 4,600 degrees Fahrenheit. It's so hot that heavy metal elements, like iron and magnesium, exist as gases and are constantly streaming out of the atmosphere and into space. But the planet's night side has, until now, remained in the dark. In a new study, published in the journal Nature Astronomy on Feb. 21, astronomers shared their first look at the planet's dark side using NASA's Hubble Telescope. Telescopes at the South African Astronomical Observatory discovered WASP-121b in 2015. The planet, which is a little bigger and heavier than Jupiter, is on the verge of being ripped apart by the gravitational forces of its home star, known as WASP 121. It makes a full orbit of that star once every 1.3 days and is tidally locked -- one side is perpetually bathed in starlight, the other is forever staring out into space. "This is one of the most extreme systems we have," says Ben Montet, an astrophysicist at the University of New South Wales who was not affiliated with the study. He notes its extremely hot day side is hotter than some stars.

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