Exoplanet has a 'glowing water vapor' atmosphere

By Ashley Strickland, CNN

Updated 1406 GMT (2206 HKT) August 7, 2017

This artist's impression shows the football-shaped planet WASP-103b (left) closely orbiting its host star.
Photos: Weird and wonderful planets beyond our solar system
This artist's impression shows the football-shaped planet WASP-103b (left) closely orbiting its host star.
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This image shows double-star system b Centauri and its giant planet b Centauri b. The star pair is the bright object at top left. The planet is visible as a bright dot in the lower right. The other bright dot (top right) is a background star.
Photos: Weird and wonderful planets beyond our solar system
This image shows double-star system b Centauri and its giant planet b Centauri b. The star pair is the bright object at top left. The planet is visible as a bright dot in the lower right. The other bright dot (top right) is a background star.
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This artist's rendering shows a Jupiter-like planet orbiting a dead white dwarf star 6,500 light-years away from Earth. The planet survived the violent phases of stellar evolution leading to the star's death.
Photos: Weird and wonderful planets beyond our solar system
This artist's rendering shows a Jupiter-like planet orbiting a dead white dwarf star 6,500 light-years away from Earth. The planet survived the violent phases of stellar evolution leading to the star's death.
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This artist's illustration shows the night-side view of the exoplanet WASP-76b, where iron rains down from the sky.
Photos: Weird and wonderful planets beyond our solar system
This artist's illustration shows the night-side view of the exoplanet WASP-76b, where iron rains down from the sky.
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Astronomers have identified a new class of habitable planets, which they call Hycean planets. These are hot, ocean-covered planets with hydrogen-rich atmospheres.