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Story summary
- Astronomers using the James Webb Space Telescope (JWST) studied 29 Cygni b, a gas giant about 15 times Jupiter's mass.
- The findings place 29 Cygni b at the boundary between planet and star formation.
- Evidence indicates it formed through bottom-up growth by accumulating metal-rich material from a protoplanetary disk.
- Its orbit aligns with its host star, supporting the conclusion that it is a planet.
