哈伯望遠鏡研究類似系外行星HAT-P38b 跟wasp67b

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哈伯望遠鏡研究類似系外行星HAT-P38b 跟wasp67b 
離類似母星也離差不多距離下那這兩顆系外行星會如何不同 ??

https://www.sciencedaily.com/releases/2017/06/170605154523.htm



This diagram compares Hubble Space Telescope observations of two "hot Jupiter"-class planets orbiting very closely to different sunlike stars. Astronomers measured how light from each parent star is filtered through each planet's atmosphere. HAT-P-38 b did have a water signature indicated by the absorption-feature peak in the spectrum. This is interpreted as indicating the upper atmosphere is free of clouds or hazes. WASP-67 b, has a flat spectrum that lacks any water-absorption feature, suggesting most of the planet's atmosphere is masked by high-altitude clouds.
Credit: Artwork: NASA, ESA, and Z. Levy (STScI); Credit: Science: NASA, ESA, and G. Bruno (STScI)