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James Webb Space Telescope Captures Direct Image of Exoplanet TWA7b

Using its Mid-Infrared Instrument’s coronagraph to mask stellar glare, Webb has revealed a faint Saturn-mass planet carving a gap in a young star’s debris disk

© A.-M. Lagrange and al. - Evidence for a sub-jovian planet in the young TWA7 disk, 2025
Image

Overview

  • The telescope’s MIRI coronagraph blocked the host star’s light to directly image TWA7b for the first time by Webb.
  • TWA7b has about 0.3 times Jupiter’s mass—similar to Saturn—and orbits its 6.4-million-year-old star at roughly 50 astronomical units.
  • Located 111 light-years away in the Antlia constellation, the exoplanet is the lowest-mass world ever directly imaged.
  • The planet occupies a gap between rings in its star’s debris disk, offering direct evidence of disk-planet interactions in an infant system.
  • Astronomers say Webb’s success with small, cold exoplanets paves the way for imaging even lighter worlds, potentially including super-Earths.