Our atmosphere is about 78% nitrogen and 21% oxygen, with traces of other things like water and carbon dioxide. It's an odd mix compared to the atmospheres of other planets. Jupiter and Saturn are ...

Prof Triaud said: “By examining the levels of CO2 in other planets’ atmospheres we can empirically measure habitability and compare it to our theoretical expectations.

TRAPPIST-1b is hotter than astronomers expected, suggesting there’s no atmosphere to transport heat around the planet.

Scientists think the answer will help us understand how these and other planets form and evolve over time. Some proposed the explanation for this gap might have to do with the planets’ atmospheres. It ...

Greene said he was more optimistic about detecting atmospheres around TRAPPIST-1’s other planets—at least before the disappointing discovery on b. But it’s too early to lose hope.

Other research teams have been using JWST to study TRAPPIST-1b, as well as other planets in the system. That includes TRAPPIST-1b’s neighbor, TRAPPIST-1c, a planet that is close enough to its ...