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James Webb Space

Potentially habitable planet TRAPPIST-1b may have a carbon dioxide-rich atmosphere

Potentially habitable planet TRAPPIST-1b may have a carbon dioxide-rich atmosphere

That haze, the researchers say, causes the planet's upper atmosphere to be hotter than the layers below, creating an environment where carbon dioxide emits light rather than absorbing it, which could explain the lack of an expected dip in previous observations.

Early galaxies weren’t mystifyingly massive after all, James Webb Space Telescope finds

Early galaxies weren’t mystifyingly massive after all, James Webb Space Telescope finds

The universe has expanded greatly since it was born about 13.8 billion years ago in the Big Bang, and that means the light from early galaxies appears reddened by the time it reaches Earth, much as how an ambulance siren sounds lower-pitched to people as the vehicle drives away.

JWST found rogue worlds that blur the line between stars and planets

JWST found rogue worlds that blur the line between stars and planets

Ray Jayawardhana at Johns Hopkins University in Maryland and his colleagues found these strange worlds in the NGC 1333 star cluster using the James Webb Space Telescope.