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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.
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]
Ursa Major, also known as the Great Bear, is a constellation in the northern sky, whose associated mythology likely dates back into prehistory.Its Latin name means "greater (or larger) bear", referring to and contrasting it with nearby Ursa Minor, the lesser bear. [1]
The International Astronomical Union (IAU) designates 88 constellations. [1] In the table below, they are listed by geographical visibility according to latitude as seen from Earth, as well as the best months for viewing the constellations at 21:00 (9 p.m.).
VY Canis Majoris (abbreviated to VY CMa) is an extreme oxygen-rich red hypergiant or red supergiant (O-rich RHG or RSG) and pulsating variable star 1.2 kiloparsecs (3,900 light-years) from the Solar System in the slightly southern constellation of Canis Major.
The Gliese (later Gliese-Jahreiß) catalogue attempts to list all star systems within 20 parsecs (65 ly) of Earth ordered by right ascension (see the List of nearest stars). Later editions expanded the coverage to 25 parsecs (82 ly). Numbers in the range 1.0–915.0 (Gl numbers) are from the second edition, which was
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Best visible at 21:00 (9 p.m.) during the month of May. Centaurus ( / s ɛ n ˈ t ɔːr ə s , - ˈ t ɑːr -/ ) is a bright constellation in the southern sky . One of the largest constellations , Centaurus was included among the 48 constellations listed by the 2nd-century astronomer Ptolemy , and it remains one of the 88 modern constellations .