The James Webb Space Telescope has captured the first evidence of carbon dioxide in the atmosphere of a planet outside our solar system.
Gas giant planets orbiting Sun-like stars 700 light-years away provide insights into their composition and formation.
In part, its extreme puffiness is caused by its high temperature (about 1,600 degrees Fahrenheit).
WASP-39 b orbits are very close to the sun, which is only one-eighth of the distance between the sun and Mercury.
Hubble and Spitzer space telescopes have previously observed water vapor, sodium, and potassium in the atmosphere of the planet.
With the help of James Webb's infrared sensitivity, scientists have now confirmed the presence of carbon dioxide on this planet as well.
It is important to understand the composition of a planet's atmosphere because it tells us something about its origin and evolution.