Webb image archive
Exoplanet 29 Cygni b (Artist’s Concept)
Exoplanet 29 Cygni b, seen in this artist’s concept, is a gas giant weighing about 15 times the mass of Jupiter. It orbits a type A star (shown at upper right) slightly hotter an...
- Date
- Apr 14, 2026
- Observatory
- James Webb Space Telescope
- Credit
- NASA / ESA / CSA / STScI
- Archive ID
- exoplanet-29-cygni-b-artists-concept
Exoplanet 29 Cygni b, seen in this artist’s concept, is a gas giant weighing about 15 times the mass of Jupiter. It orbits a type A star (shown at upper right) slightly hotter and more massive than our Sun, at an average distance of 1.5 billion miles. The star is known to possess a dusty debris disk. A hypothetical comet fragment is shown approaching the planet, while previous impacts have left dark splotches on its cloudtops, similar to what was seen from the Shoemaker-Levy 9 impact on Jupiter in our solar system.
Astronomers studied 29 Cygni b with NASA’s James Webb Space Telescope. They determined that it likely formed from accretion, a bottom-up process where small bits of rock and ice clump together and grow larger over time, rather than from disk fragmentation. In other words, it formed like a planet and not like a star.