(also designated NGC is a globular cluster in the constellation Sagittarius. It has an apparent visual magnitude of and its angular diameter is arc-minutes. lies at an estimated distance of light years.
Messier 73 also known as NGC is an asterism of four stars in the constellation of Aquarius. An asterism is composed of physically unconnected stars that appear close to each other in the sky as seen from Earth.
Markarian’s Chain: in the Virgo Constellation. It is a stretch of galaxies that forms part of the Virgo Cluster. It is called a chain because, when viewed from Earth, the galaxies lie along a smoothly curved line.
(also designated NGC is a elliptical galaxy in the constellation Virgo. It has an apparent visual magnitude of and its angular diameter is 4 arc-minutes. lies at an estimated distance of 60 million light years.
Foto di Fabrizio Cristofori - Associazione Astrofili Centesi