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• NASA’s Webb Detects Thick Atmosphere Around Broiling Lava World

  December 11, 2025

  Illustration of a planet orbiting a star, with the words "Artist’s Concept" in the lower left corner. A small portion of the star is visible in the upper left corner; most of the star is out of the frame. The star has a Sun-like appearance: yellowy orange with darker orange mottling and an orange glow. The planet is toward the lower right. The left half of the visible hemisphere is lit by the star; the right half is in darkness. The lit side of the planet has the bright whitish fuzzy glow of an atmosphere. The surface of the planet seems to glow with swaths and patches of bright orange as though part of the planet is molten. The boundary between the lit and dark side of the planet (the terminator) is fuzzy. The background is black with some faint background stars and hints of other planets.

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• NASA’s Webb Identifies Earliest Supernova to Date, Shows Host Galaxy

  December 09, 2025

  Webb image shows hundreds of galaxies of all shapes and sizes against the black background of space. Toward the center-left is a large white spiral galaxy that is almost face-on. To the right of this is a large box, which zooms in on an area at top right. Within the box is a faint red dot at the center, with the label GRB 250314A.

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• NASA's Roman Could Bring New Waves of Information on Galaxy’s Stars

  November 20, 2025

  Mosaic titled "Red Giant Echoes with Roman," which shows 11 artist’s concepts of stars, including the Sun and 10 red giants of various radii against a black background. The illustrations are organized roughly into three rows with the grid size of the largest red giant star, located in the bottom right, the equivalent of two rows. Each star is depicted as a bright and blotchy orb. Starting with the mosaic’s smallest star, the Sun, in the top left corner and shifting to the right before moving to the next row, the illustrations become gradually larger and change from shades of light orange to red-orange. Each star’s radius is placed at the bottom of its grid. From left to right, the four light orange stars in the top row are listed with the following radii: Sun, Radius 1.0; Radius 6.3; Radius 7.0, and Radius 7.8. The second row has three orange stars and reads: Radius 8.8; Radius 9.7; and Radius 10.7. The third has four red-orange stars and reads: Radius 11.8; Radius 15.0; Radius 20.1; and Radius 33.7.

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