New Exoplanet Found in Kepler-51's 'Super-Puff' System

New observations from NASA's James Webb Space Telescope have revealed a fourth planet in the Kepler-51 system, known for its ultra-low density 'super-puff' planets. The discovery was made after unexpected transit timing variations suggested gravitational influences from an additional planet. This new planet, Kepler-51e, has not been observed transiting, but its presence helps explain the unusual orbital dynamics of the system's known planets. The findings, published in The Astronomical Journal, provide new insights into the formation and characteristics of these rare, low-density planets.