Astronomers have used the James Webb Space Telescope to investigate the supergiant exoplanet 29 Cygni b, a discovery that could help clarify the fundamental boundary between planets and stars. The work focuses on understanding how such massive worlds, which challenge traditional planetary formation models, come into existence.
By analyzing the planet's atmosphere and composition, the telescope's powerful instruments are gathering data previously unattainable. This information is critical for testing theories about whether these behemoths form like gas giants or through processes more akin to stellar birth.