James Webb Space Telescope directly studies an exoplanet’s surface for the 1st time: ‘We see a dark, hot, barren rock’
space.com May 5, 2026

James Webb Space Telescope directly studies an exoplanet’s surface for the 1st time: ‘We see a dark, hot, barren rock’

AI-summarised brief · reviewed before publication

Astronomers used the James Webb Space Telescope to directly analyze the surface of exoplanet LHS 3844 b, a "super-Earth" 30% larger than our planet. The findings reveal a dark, airless world with a surface resembling Mercury, dominated by basalt, a dark volcanic rock. The planet orbits a cool red dwarf star and is tidally locked, with temperatures reaching 1,340 degrees Fahrenheit on its dayside. The study marks a significant step in understanding distant planets' geology.

💡 Why It Matters

  • · The ability to directly study an exoplanet's surface sheds new light on the geological processes that shape these distant worlds, offering insights into their potential for hosting life.
  • · By analyzing the surface composition of LHS 3844 b, scientists can better understand the formation and evolution of rocky planets beyond our solar system.