Friday, Jun 21, 2024

Foto do perfil de apodbrazil Iris Nebula By Lino Benz . Iris Nebula NGC 7023, sometimes known as the Iris Nebula or by the acronym C 4, is a diffuse nebula visible in the northern constellation of Cepheus. It was discovered by William Herschel in 1794. NGC 7023 is a reflection nebula, meaning it reflects the light of some nearby stars; probably the main star responsible for its illumination is precisely the seventh magnitude star, cataloged as HD 200775, which would be surrounded by the nebula, together with other less bright stars born from its dust and which form the open cluster. The nebula is probably about 1400 light years away from us and measures about 6 light-years. It is probably part of the vast Cepheus Molecular Nebular Complex.