Pisces Constellation

 Facts About the Fishes

Pisces, named for the Latin plural of fish, occupies 889 square degrees, making it the 14th largest constellation overall. While it is a fairly large constellation, its stars are faint — none are brighter than fourth magnitude - making it challenging to see in the sky with the naked eye.

Pisces is notable for containing the point at which the sun crosses the celestial equator into the Northern Hemisphere around March 20 each year. This point, called the vernal equinox, used to lie in Aries, but has moved into Pisces because of the Earth's wobble on its axis, called precession, according to astronomer and author Ian Ridpath.

Pisces Constellation Credit: VectorStock

Locating Pisces

Pisces is in the first quadrant of the Northern Hemisphere and covers a large V-shaped region. Its large area, coupled with its dim stars, makes it hard to pick out in the night sky. Northern Hemisphere observers are able to see Pisces most clearly in early autumn.

• Right Ascension: 0.85 hours
• Declination: 11.08 degrees
• Visible: Between latitudes 90 degrees and minus 65 degrees.
• Best viewed: at 9 p.m. between Nov. 6 and Nov. 9.

Pisces is located northeast of Aquarius and to the northwest of the constellation Cetus the Sea-monster. Other constellations bordering Pisces are Triangulum, Andromeda, Pegasus and Aries.

Notable stars and objects

Eta Piscium, also known as Alpherg or Kullat Nunu, is Pisces’ brightest star. It is a bright giant star (G class) that is 294 light-years from Earth and has a luminosity that is 316 times that of the sun. The constellation’s second brightest star is a yellow giant about 130 light-years from Earth known as Gamma Piscium.

Alpha Piscium is the third brightest star in Pisces and is made up of a pair of white dwarf stars in close proximity. It is also called Alrescha ("the cord") as it illuminates the spot where it appears that the tails of the two fish are tied together.

Pisces also contains a Messier object — which are galaxies, nebulae and star clusters recorded by 18th Century French astronomer Charles Messier. Messier 74 is a spiral galaxy located between the stars alpha Arietis and eta Piscium.

Mythology

In the sky, Pisces is represented as two fish swimming at right angles to each other, one to the north and one to the west. They are attached by a cord. The fish themselves are apparently the Greek goddess Aphrodite and her son, Eros, who turned into fish and jumped into the Euphrates River to evade the fiery breath of the monster Typhon, "the most awful monster the world had ever seen," according to Ridpath.

In astrology, which is not a science, Pisces is the 12th sign in the Zodiac and represents those born between Feb. 20 and March 20.

Reference: space.com