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James-Webb Telescope Directly Images Saturn-Sized Exoplanet TWA7b

Webb’s eclipse-simulating coronagraph masked the star’s glare to reveal a young Saturn-sized planet orbiting 110 light-years away.

Overview

  • This represents the first exoplanet ever directly imaged by the James-Webb Space Telescope.
  • TWA7b orbits a six-million-year-old star about 110 light-years from Earth within a dust-and-gas debris disk.
  • The planet’s mass is estimated at about 100 Earth masses, or 0.3 times that of Jupiter, making it ten times lighter than any exoplanet previously imaged directly.
  • Researchers deployed Webb’s eclipse-simulating coronagraph to block the star’s glare and capture the planet’s faint thermal emission.
  • The success of Webb’s direct imaging suggests the telescope could soon spot and photograph smaller, Earth-sized worlds.