Science, Space and Technology News 2024
Each glory is unique, depending on the composition of the planet’s atmosphere and the colors of the light from the star that illuminates it. WASP-76 is a yellow and white main sequence star like our Sun, but different stars create glories with different colors and patterns. Credit: ESA, work performed by ATG under contract for ESA. CC BY-SA 3.0 IGO
“There’s a reason no glory has been seen before outside our Solar System – it requires very peculiar conditions,” explains Olivier Demangeon, astronomer at the Instituto de Astrofísica e Ciências do Espaço in Portugal and lead author of the study. If confirmed, this first exoplanetary glory would provide a beautiful tool to understand more about the planet and star that formed it.
This result demonstrates the power of ESA’s Cheops mission to detect subtle, never-seen-before phenomena on faraway worlds. But scientists have been puzzled by an apparent asymmetry, or wonkiness, in WASP-76b’s ‘limbs’ – its outermost regions seen as it passes in front of its host star.Artist’s impression of CHEOPS in orbit above Earth. In this view the satellite’s telescope cover is closed. Credit: ESA / ATG medialab
“This discovery leads us to hypothesise that this unexpected glow could be caused by a strong, localised and anisotropic reflection – the glory effect.”While the glory effect creates rainbow-like patterns, the two aren’t the same. Rainbows form as sunlight passes through one medium with a certain density to a medium with a different density – for example from air to water – which causes its path to bend .
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