NGC 7023 - Iris Nebula
- Galerie:
- Universe
- Beschreibung:
- The Iris Nebula, also known as NGC 7023 and Caldwell 4, is a bright reflection nebula in the constellation Cepheus. The designation NGC 7023 refers to the open cluster within the larger reflection nebula designated LBN 487.The nebula, which shines at magnitude +6.8, is illuminated by a magnitude +7.4 star designated HD 200775. It is located near the Mira-type variable star T Cephei, and near the bright magnitude +3.23 variable star Beta Cephei. It lies 1,300 light-years away and is six light-years across.
- Copyright:
- Anna & Hellmut Schulze-Wenck
- Keywords:
- #M42 #NGC_1973 #NGC_1975 #NGC_1977 #orion_nebula #running_man_nebula #astrophotography #deep_sky #sky #space #science #universe #stars #nebula #LRGB #narrowband #oxygen #sulfur #hydrogen #dark #material #supernova #black_holes #white_dwarfs #red_dwarfs