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. It was included among the 48 constellations listed by the 2nd century astronomer Ptolemy. Commonly represented as a water snake, it straddles the celestial equator.
The constellation Hydra as it can be seen by the naked eye.
Planetary nebula Abell 33 captured using ESO's Very Large Telescope.
Elliptical galaxy NGC 3923.
Ancient globular cluster NGC 6535.
Libra is a constellation of the zodiac and is located in the Southern celestial hemisphere. Its name is Latin for weighing scales. Its old astronomical symbol is (♎︎). It is fairly faint, with no first magnitude stars, and lies between Virgo to the west and Scorpius to the east. Beta Librae, also known as Zubeneschamali, is the brightest star in the constellation. Three star systems are known to have planets.
The constellation Libra marked on a naked eye view.
Libra as depicted in Urania's Mirror, a set of constellation cards published in London c.1825
NGC 5897
NGC 5885