Ophiuchus

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Guisard - Milky Way

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OphiuchusCC

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Kepler Drawing of SN 1604

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Stjärnbild på Herkules, 1602 - Skoklosters slott - 102426

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Rho Ophiuchi

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Rho Ophiucus Widefield

Ophiuchus is a large constellation located around the celestial equator. Its name comes from the Greek Ὀφιοῦχος (Ophiouchos), meaning "serpent-bearer", and it is commonly represented as a man grasping the snake that is split into two parts, represented by the neighboring constellation Serpens. Ophiuchus is one of the 88 modern constellations recognized by the International Astronomical Union (IAU) and was also one of the 48 constellations listed by the 2nd-century astronomer Ptolemy.

History and mythology

The constellation Ophiuchus has been associated with numerous myths and stories. In Greek mythology, it is often identified with Asclepius, the god of healing and medicine, who learned the secrets of keeping death at bay after observing one serpent bringing healing herbs to another. This association with healing is reflected in the symbol of the serpent, which is also used in the medical profession today.

Astronomical features

Ophiuchus is situated between Aquila, Serpens, and Hercules, north of the Scorpius constellation. Despite not being as well known as many other constellations, Ophiuchus contains several interesting astronomical objects, including Barnard's Star, one of the nearest stars to Earth, and RS Ophiuchi, a recurrent nova system. Additionally, the center of our galaxy, the Milky Way, lies in the direction of Ophiuchus, making it a rich area of the sky for star clusters and nebulae.

Astrology vs. Astronomy

In astrology, Ophiuchus is sometimes called the "13th zodiac sign", due to the sun's presence in the constellation for about 18 days each year from November 29 to December 17. However, this astrological sign is not recognized by most astrologers in the zodiac system, which remains based on the twelve traditional signs. The inclusion of Ophiuchus in astrology has been a topic of debate, but from an astronomical perspective, the constellations of the zodiac are merely a convenient way of marking the path of the sun through the sky over the course of a year.

Observation

Ophiuchus is best visible at latitudes between +80° and -80°, making it observable from most places on Earth. The best time to view the constellation is during the summer months in the Northern Hemisphere. When observing, look for its distinctive 'house' shape, which is formed by its brightest stars.

Notable stars and objects

- Barnard's Star: One of the closest stars to Earth, located in Ophiuchus. - RS Ophiuchi: A recurrent nova system in Ophiuchus. - Deep sky objects include the Ophiuchus Cluster, a large grouping of stars, and several well-known nebulae.

Cultural significance

Ophiuchus has been significant in various cultures throughout history, not only in Greek mythology but also in ancient Babylonian astronomy, where it was known as the "Sitting Gods" constellation. Its representation as a figure holding a serpent underscores the universal themes of healing and renewal.