![]() Epsilon Eridani, an orange main sequence star located only 10.5 light years from the Sun, is the third nearest star or star system that can be seen by the unaided eye. Located at the constellation’s southern tip, the star is a binary system approximately 139 light years distant from Earth. These include the famous variable stars V838 Monocerotis, Plaskett’s Star, S Monocerotis and R Monocerotis, the bright open cluster Messier 50, the Rosette Nebula, the Cone Nebula, the Christmas Tree Cluster, and Hubble’s Variable Nebula, illuminated by R Monocerotis.Įridanus, the celestial river, is the sixth largest constellation and home to Achernar, the ninth brightest star in the sky. Its brightest stars are only fourth magnitude, which means that it is not easily seen with the unaided eye in less than ideal conditions, but it contains several well-known stars and deep sky objects. Situated between Canis Major and Canis Minor, Monoceros is a faint constellation that represents the celestial Unicorn. Gemini constellation hosts several notable deep sky objects: the open cluster Messier 35, the Jellyfish Nebula, the Eskimo Nebula (Clown Face Nebula) and the Medusa Nebula. The system is made of up of six stars formed into three pairs. Castor is a multiple star system with a combined visual magnitude of 1.58, approximately 51 light years distant. ![]() The star is an evolved orange giant, the nearest of its kind to the Sun. The brighter Pollux has an apparent magnitude of 1.14 and is 34 light years distant. The constellation’s brightest stars, Pollux and Castor, appear similar to the unaided eye, but are really quite different. The constellation Gemini can be found east of Taurus, between Procyon and the bright stars of Auriga. It consists of an F-class white main sequence star and a dim white dwarf. It has an apparent magnitude of 0.34 and is also a binary star system. Procyon, the brightest star in Canis Minor, is the eighth brightest star in the sky. The bright open cluster Messier 41, easy to observe in a small telescope, can be seen near Sirius. With a visual magnitude of -1.46, Sirius has almost twice the brightness of Canopus, the second brightest of all stars, located in the southern constellation Carina. It is a binary star system composed of an A-class main sequence star and a D-type white dwarf. Located in Canis Major, only 8.6 light years from Earth, Sirius is also the fifth closest star system to our own. Sirius, the Dog Star, is the single brightest of all stars. The constellations Canis Major and Canis Minor harbour two of the 10 brightest stars in the sky. The constellation is easy to find in the sky because its brightest stars form a prominent pentagon shape. (It also known as “The Seven Sisters”, or the astronomical designations NGC 1432/35 and M45.) Image: NASA, ESA, AURA, Caltech, Palomar ObservatoryĪuriga constellation, the celestial Charioteer, hosts Capella, the sixth brightest star in the sky, and three bright open clusters catalogued by Charles Messier: Messier 36, Messier 37 and Messier 38. The Pleiades is an open cluster consisting of approximately 3,000 stars at a distance of 400 light-years (120 parsecs) from Earth in the constellation Taurus. ![]()
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