The James Webb measures for the first time the temperature of a world as small, rocky and cold as ours

The James Webb measures for the first time the temperature of a world as small, rocky and cold as ours

The result indicates that the day side of the planet has a temperature of about 230 degrees Celsius and suggests that it does not have a significant atmosphere.

Recreation of the Trappist-1 system with its seven planets NASA/R. HURT/T. PYLE

Trappist-1 is a planetary system 40 light years from us made up of seven rocky planets, five of them very similar in size to Earth. Now, the James Webb Space Telescope has set its eyes on the innermost planet of theirs, measuring…

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