Now Playing
Webb Rewrites Exoplanet Science: Carbon Worlds, Alien Weather & Flawed Data | May 2025
Audio is available on Spreaker — see link below.
NASA's James Webb Space Telescope has uncovered a lemon-shaped carbon planet that defies formation theory, mapped the first daily weather cycle on an exoplanet, and revealed that a decade of atmospheric measurements may need recalibration. Three discoveries, one paradigm shift.
Audio is available on Spreaker — see link below.
Astronomers have found a planet that formation theory says cannot exist. It's made almost entirely of carbon, it's shaped like a lemon, it orbits a neutron star, and nobody can explain how it got there.
Set that aside for a moment, because Webb also confirmed something quieter but nearly as significant. Three hundred and thirty light-years away, there's a Saturn-sized planet called TOI-199b with surface temperatures around one hundred and seventy-five degrees Fahrenheit.
The third discovery may be the one with the longest practical consequences. Webb mapped the first daily weather cycle ever resolved on an exoplanet, on a hot Jupiter called WASP-94Ab.
For the past ten-plus years, most exoplanet atmospheric studies have used transmission spectroscopy, reading starlight filtered through a planet's atmosphere as it transits its star. The technique works, but it averages the signal from the whole atmospheric limb.
The question worth sitting with is how far this goes. If morning cloud layers are common on hot Jupiters, and WASP-94Ab suggests they might be, then a substantial portion of atmospheric estimates across thousands of studied planets could be off.
Chapter summary auto-generated from the verified script. Listen to the full episode for the complete content.