Comparison of WASP-121b stratosphere with brown dwarf atmosphere

This diagram presents evidence for the existence of a stratosphere on a planet orbiting another star. As on Earth, the stratosphere increases in temperature with altitude. The water emissions from the Jupiter-sized planet's upper atmosphere show this. The results are in marked contrast to the spectrum of a failed star, a brown dwarf, which shows water absorption because the atmosphere is cooling with altitude increase.

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Credit:

NASA, ESA, and A. Feild (STScI)

About the Image

NASA press release
NASA caption
Id:opo1731b
Type:Artwork
Release date:3 August 2017, 11:24
Size:2500 x 2496 px

About the Object

Name:WASP-121b
Type:Milky Way : Planet
Distance:900 light years
Category:Exoplanets

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