Jupiter through celestron telescope8/12/2023 To create the temperature map, the researchers calculated the planet's infrared glow by measuring the difference in the glow of the parent star during the time the planet transited in front of the star's disk and then when it disappeared behind it. James Webb Space Telescope reveals alien planet's atmosphere like never before James Webb Space Telescope's ground-breaking study of a planet-forming disk hints at future exoplanet discoveries James Webb Space Telescope notches 1st rocky planet confirmation The Webb measurements, for the first time, enabled scientists to map these differences in detail. As a result of this tidal locking, considerable differences in temperature exist across the planet's surface. That means one side of the planet constantly faces the star, just like the moon's near side always faces Earth. In addition to being so massive, hot and close to its parent star, WASP-18 b is also tidally locked. "That made it really exciting to finally see water features with these JWST observations." "Because the water features in this spectrum are so subtle, they were difficult to identify in previous observations," Anjali Piette, a postdoctoral fellow at the Carnegie Institution for Science and one of the authors of the new research, said in the statement. None of these space telescopes, however, was sensitive enough to see the signatures of water in the planet's atmosphere. WASP-18 b, discovered in 2008, has been studied by other telescopes, including the Hubble Space Telescope, NASA's X-ray space telescope Chandra, the exoplanet hunter TESS and the now-retired infrared Spitzer Space Telescope.
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