Serpens
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Serpens is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations designated by
Serpens held by Ophiuchus, as depicted in Urania's Mirror, a set of constellation cards published in London c. 1825. Above the tail of the serpent is the now-obsolete constellation Taurus Poniatovii while below it is Scutum
The constellation Serpens (Caput) as it can be seen by the naked eye
The constellation Serpens (Cauda) as it can be seen by the naked eye
Messier 5, a globular cluster that can be seen with the naked eye under good conditions
Hoag's Object
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Hoag's Object is an unusual ring galaxy in the constellation of Serpens Caput. It is named after Arthur Hoag, who discovered it in 1950 and identified it as either a planetary nebula or a peculiar gal
Serpens
…extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies. Part of the Milky Way's galactic plane passes through Serpens Cauda, which…
Hoag's Object, taken by the Hubble Space Telescope in July 2001