Similar to おおぐま座矮小銀河I
 - C/2015 K7 (COIAS)
 - C/2024 G3 (ATLAS)C/2024 G3 (ATLAS)
 - 紫金山・アトラス彗星C/2023 A3 (Tsuchinshan–ATLAS)▲1 trends
 - C/2024 S1 (ATLAS)C/2024 S1 (ATLAS)
 - C/2025 F2 (SWAN)C/2025 F2 (SWAN)
 - CARMACombined Array for Research in Millimeter-wave Astronomy
 - CARMENES
 - CD -38°245
 - CD銀河Type-cD galaxy
 - CERGACERGA Observatory
 - CfA赤方偏移サーベイCfA Redshift Survey
 - CFBDSIR 1458+10CFBDSIR J145829+101343
 - CFBDSIR J214947.2-040308.9CFBDSIR 2149−0403
 - Cha 110913-773444Cha 110913−773444
 - CHIPSatCHIPS (satellite)
 - CHIRON
 - CH星CH star
 - ClG J2143-4423フィラメント
 - CLOVER (電波望遠鏡)Clover (telescope)
 - CNEOS 2014-01-08CNEOS 2014-01-08
 - CNOサイクルCNO cycle
 - COBECosmic Background Explorer
 - COBE (小惑星)9997 COBE
 - COCONUTS-2bCOCONUTS-2b
 - COIAS
 - Cool Companions on Ultrawide OrbitsCool Companions on Ultrawide Orbits
 - CORAVEL
 - COROTCoRoT