Did you know there are 88 official constellations? Learn what they are and how to find them. On cloudy nights you can read the ancient myths and legends that tell their exciting stories.
Andromeda the Chained Princess
Andromeda stands in the northern sky eternally chained to her rock. She is one of the five constellations that Ptolemy described in the second century, all part of one particular ancient Greek myth. In the constellation is a quadruple star, a blue snowball, exoplanets and spiral galaxies.
Auriga the Charioteer
The constellation Auriga represents a charioteer, but he has no chariot. However he does have a she-goat and two kids, as well as a rare ring galaxy and a runaway star. Capella is one of the sky's brightest stars, but it also has some surprises.
Boötes the Herdsman
This ancient constellation contains black holes as massive as a billion Suns, extrasolar planets and a meteor shower acquired from an extinct neighbor. Its brightest star, a red giant 25 times the diameter of the Sun, is a sign that spring is here.
Cassiopeia the Queen
High in the sky, circling the north celestial pole are the distinctive stars of Cassiopeia, the boastful queen who nearly destroyed her kingdom. The Milky Way runs through the constellation and it's full of star clusters, galaxies and evidence of the life cycles of stars.
Cats in the Sky
There are three constellations named for dogs, but what about cats in the sky? There is astrocat Felicette who went into space and returned safely to Earth, but also constellations of big cats and a pawprint 50 light years across.
Cepheus the King
An ancient Greek tale of pride and passion is played out across the sky, involving five constellations including Cepheus the king. In Cepheus there are stars being born and stars at the end of their lives, including those which will die in a blaze of glory.
Cetus the Sea Monster
Whale or monster? Benign plankton-eating creature or terrifying colossus, a hybrid with gaping jaws and the powerful scaly coils of a sea serpent? This is the constellation Cetus. The monster fell to the hero Perseus, but the stars and deep sky objects are impressive.
Constellation Maps [offsite link]
Constellation maps of the northern and southern skies in different seasons are shown on this companion site to Constellations.
Constellation or Asterism & Other Posers
Constellations, asterisms, galaxies and star clusters are all groups of stars. So how are they different? Why isn’t the Big Dipper a constellation? Where are the globular clusters? And if Saturn is in Virgo, has it left the Solar System?
Constellations [offsite link]
An alphabetical list of the constellations with basic information and a drawing, compiled by Jim Kaler.
Cygnus the Swan
Seduction and supergiants, a beautiful blue and amber double star, vast explosions, a giant cloud that looks like North America. Where does myth end and astronomy begin? Here is a tour of some of the highlights of the constellation Cygnus the swan.
Draco the Dragon
An enormous dragon circles the northern celestial pole. The constellation Draco contains a star that was the pole star at the time of the pharaohs, some interesting galaxies and the most complex planetary nebula yet discovered.
Heavenly Aviaries - Bird Constellations
The night sky is full of starry birds. Here is a selection, ranging from the majestic swan to the exotic birds of the southern skies: the peacock, bird of paradise and toucan. There is also an emu whose image appears not in the stars, but in the dark nebulae.
Leo the Lion
Leo is a Zodiac constellation and its stars have represented a lion for over four thousand years. Leo contains one of the brightest stars in the sky and one of the dimmest, as well as a selection of spiral galaxies loved by amateur astronomers. And what was Regulus's dark secret?
Lyra the Heavenly Harp
Music of the spheres? Here’s a harp to play it on: Lyra, the harp of Orpheus that almost brought his beloved back from death. The constellation has one of the sky’s brightest stars, a star that is really four stars, and a colorful donut.
Orion the Hunter
The stars of Orion have been part of humanity's mythscape for thousands of years. Seven bright stars outline the hunter's body. One of them is a supergiant nearing the end of its life. Yet just visible to the unaided eye is a vast stellar nursery where the next generation of stars is forming.
Pegasus the Winged Horse
A flying horse on feathered wings - it's the constellation Pegasus. You can spot it by its most noticeable feature, the Great Square of Pegasus, though one star of the square belongs to poor Princess Andromeda. There's also a star in Pegasus very like our Sun with a planet circling it.
Star Tales [offsite link]
An updated version of Ian Ridpath´s classic Star Tales about the myths and legends of the night sky is now available online.
What Are Constellations
Stories of gods and mortals, love and betrayal, monsters and heroes. They all adorn the night sky in the form of constellations. These star groups have also served as calendars, navigation aids and internationally defined areas of the celestial sphere.
Who Let the Dogs Out?
Someone must have left the door open, because the skies are full of dogs. You can see the dogs of Orion and the hunting dogs of the shepherd Bootes in pursuit of the Great Bear. There is also the Running Dog Nebula and the memory of poor Laika, the first cosmonaut, who perished in space.
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