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Hydra is the largest of the 88 modern constellations, measuring 1303 square degrees, and also the longest at over 100 degrees. Its southern end borders Libra and Centaurus and its northern end borders Cancer. [1] It was included among the 48 constellations listed by the 2nd century astronomer Ptolemy.
Hydra is the largest constellation, covering more than 1 ⁄ 32 of the night sky and 19 times the area of Crux, the smallest constellation. The International Astronomical Union (IAU) designates 88 constellations of stars. In the table below, they are ranked by the solid angle that they subtend in the sky, measured in square degrees and ...
Chaena is the commander of a spaceship from the constellation Hydra, which has crashed on the island of Sardinia.. An Earth scientist, some technicians, their companions, and some Asian agents (they deny being Chinese because the Chinese cooperate with the Americans) are abducted by the aliens and forced to repair the ship.
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]
NGC 3621 is a field spiral galaxy about 22 Mly (6.7 Mpc) away [2] [5] in the equatorial constellation of Hydra. It was discovered by German-British astronomer William Herschel on 17 February 1790. [6] NGC 3621 is comparatively bright and can be well seen in moderate-sized telescopes.
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.
λ Hydrae, Latinised as Lambda Hydrae, is a spectroscopic binary [12] star in the constellation Hydra.Its apparent magnitude is 3.61 Located around 33.3 parsecs (109 ly) distant.
NGC 3242 (also known as the Ghost of Jupiter, Eye Nebula or Caldwell 59) is a planetary nebula located in the constellation Hydra.. William Herschel discovered the nebula on February 7, 1785, and catalogued it as H IV.27.