A lava world that circles its star in under 11 hours should have lost its atmosphere long ago. Webb data suggest TOI-561 b keeps a thick one that reflects about three-quarters of its starlight.
Radio images from the VLA and ALMA show the outer atmosphere of Betelgeuse stretching and relaxing in step with a close companion star that orbits inside it.
The discs and gas shell of the Orion Nebula look younger than its stars. Leiden astronomers propose that two stars merged a few hundred thousand years ago and turned up the light.
NASA’s Perseverance rover has measured fine and ultrafine Mars dust clinging to spacesuit samples, the smallest grains yet measured on the planet. Their size and chemistry matter for future crews.
