柠檬形状系外行星富含碳分子，挑战现有行星形成理论

Core Insights - A unique exoplanet named PSR J2322-2650b, resembling a lemon, has been discovered by scientists at the University of Chicago using the James Webb Space Telescope, challenging existing theories of planet formation [1][3] Group 1: Exoplanet Characteristics - The exoplanet is located approximately 4000 light-years away and orbits a rapidly rotating pulsar, which is a rare occurrence [3] - The atmosphere of PSR J2322-2650b is rich in carbon molecules (C3, C2) and exhibits strong westerly winds, which contradicts current understanding of such celestial bodies [3] - The planet's shape is elongated due to the gravitational pull of the pulsar, making it resemble an ellipsoid, specifically a lemon [3] Group 2: Temperature and Atmospheric Conditions - The surface temperature of the coldest region on the planet reaches about 650°C, and its "year" lasts approximately 7.8 hours [3] - Unlike most gas giants, the atmospheric wind direction on this planet is opposite to its rotation [3] - The planet appears deep red with clouds of graphite floating in its atmosphere, described as "an evil lemon," marking it as one of the most peculiar exoplanets known to date [3] Group 3: Implications for Planetary Science - The extreme carbon content in the atmosphere poses significant challenges to traditional theories, which suggest that such planets should contain a richer variety of elements due to their origins from stripped stellar cores [3] - This discovery provides new insights into the chemical composition and atmospheric dynamics of exoplanets, potentially reshaping the understanding of their formation and evolution [3]