Hubble investigates strange weather conditions in a fast-paced home

This is an artist’s image of the planet KELT-20b orbiting a blue and white star. The giant planet is so close to its star (5 million miles) that ultraviolet radiation from the star warms the planet’s atmosphere to over 3,000 degrees Fahrenheit. This forms a heat layer where the atmosphere increases in temperature with altitude. This is the best evidence to date – obtained from the Hubble Space Telescope – that a host has a direct effect on the planet’s atmosphere. The boiling planet is 456 light-years away. Credit: NASA, ESA, Leah Hustak (STScI)

Burning worlds evaporate most of the dust in their atmosphere

“When you’re hot, you’re hot!” crowned country singer Jerry Reed in a top pop song from 1971. Hubble astronomers could change the lyrics to: “When you’re hot, you’re so hot!”

This comes from studying planets that are so insecurely close to the parent star that they are fried at a boiling temperature above 3,000 degrees Related

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