Comets Contains additional comets and enhancements to the ones that are included in the stock installation of Celestia 2P/Encke 3D/Biela 4P/Faye 5D/Brorsen 6P/d'Arrest 7P/Pons–Winnecke 8P/Tuttle 10P/Tempel 11P/Tempel–Swift–LINEAR 67P/Churyumov-Gerasimenko 73P/Schwassmann–Wachmann 81P/Wild 103P/Hartley C/1980 E1 (Bowell) C/2012 S1 (ISON) C/2013 A1 (Siding Spring) C/2014 UN271 (Bernardinelli-Bernstein) C/2020 F3 (NEOWISE) C/2021 A1 (Leonard) D/1993 F2 (Shoemaker-Levy 9)