These worlds are among the least dense ever found, and all attempts to probe their atmospheres have been blocked by a mysterious smog.

These cotton candy exoplanets hide behind a haze even the James Webb Space Telescope can't penetrate

Source: space
Source Link: https://www.space.com/astronomy/exoplanets/these-cotton-candy-exoplanets-hide-behind-a-haze-even-the-james-webb-space-telescope-cant-penetrate