2024年11月1日 · Kepler-51 d is a Neptune-like exoplanet that orbits a F-type star. Its mass is 7.6 Earths, it takes 130.2 days to complete one orbit of its star, and is 0.509 AU from its star. Its …

Kepler-51d is the puffiest planet in the system, with an density of just 0.0381 g/cm 3. It is also the largest planet orbiting Kepler-51, with 9.32 times Earth's radius (59,400 km), almost the same …

2024年12月4日 · Using the James Webb Space Telescope (JWST), astronomers have discovered a fourth world in a strange system of ultralight "super puff" planets. The new …

2024年12月3日 · The research team set out to study Kepler-51d, the third planet in the system, with NASA's James Webb Space Telescope (JWST) but almost missed their chance when the …

2024年12月4日 · We show that the departure from the three-planet model is explained by including a fourth outer planet, Kepler-51e, in the TTV model. A wide range of masses (≲ …

2024年10月2日 · Kepler-51 is a ≲ 1Gyr -old Sun-like star hosting three transiting planets with radii ≈ 6 - 9R⊕ and orbital periods ≈ 45 - 130days.

2024年9月10日 · If they form by accreting nebular gas through a circumplanetary disk, one might expect super-puffs to be spinning quickly. Here, we derive upper limits on the rotational …

2019年12月20日 · Kepler-51 is a 500-million-year-old G-type star located 2,615 light-years away in the constellation of Cygnus. New observations from the NASA/ESA Hubble Space …

Unlike other possible solutions, the one in which Kepler-51e is around the 2:1 mean motion resonance with Kepler-51d implies low orbital eccentricities (≲0.05) and comparable masses …

2024年12月4日 · The Kepler-51 system was already known for its three ultra-low-density “super-puff” planets, but this latest finding adds another layer of complexity. The team identified the …