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The Greek constellation of Hydra is an adaptation of a Babylonian constellation: the MUL.APIN includes a "serpent" constellation (MUL.DINGIR.MUŠ) that loosely corresponds to Hydra. It is one of two Babylonian "serpent" constellations (the other being the origin of the Greek Serpens), a mythological hybrid of serpent, lion and bird. [2]
NGC 3316 is a barred lenticular galaxy [2] [3] located about 190 million light-years away [2] in the constellation Hydra. [4] The galaxy was discovered by astronomer John Herschel on March 26, 1835. [ 5 ] [ 6 ] NGC 3316 is a member of the Hydra Cluster , [ 7 ] and appears to have a small companion galaxy known as HCC 15.
NGC 3311 is a super-giant [2] elliptical galaxy [3] (a type-cD galaxy) [4] [3] located about 190 million light-years away [5] in the constellation Hydra. [6] The galaxy was discovered by astronomer John Herschel on March 30, 1835.
NGC 3200 is a large spiral galaxy located in the constellation Hydra. Its velocity relative to the cosmic microwave background is 3,877 ± 25 km/s, which corresponds to a Hubble distance of 57.2 ± 4.0 Mpc (~187 million ly). NGC 3200 was discovered by American astronomer Edward Singleton Holden in 1882. [1]
The Hydra Cluster (or Abell 1060) is a galaxy cluster that contains 157 bright galaxies, appearing in the constellation Hydra. [4] The cluster spans about ten million light-years and has an unusually high proportion of dark matter. [5] The cluster is part of the Hydra–Centaurus Supercluster located 158 million light-years from Earth.
NGC 3923 is an elliptical galaxy located in the constellation Hydra. It is located at a distance of about 90 million light years from Earth, which, given its apparent dimensions, means that NGC 3923 is about 155,000 light years across. NGC 3923 is an example of a shell galaxy where the stars in its halo are arranged in layers.
This is the list of notable stars in the constellation Hydra, sorted by decreasing brightness. Name B F G. Var HD HIP RA Dec vis. mag. abs. mag. Dist. Sp. class Notes
NGC 5135 is a barred spiral galaxy located in the constellation Hydra. It is located at a distance of about 200 million light years from Earth. It was discovered by John Herschel on May 8, 1834. [ 2 ]