Gemini (the Twins) is one of the northern zodiac constellations. It is home to the bright stars Pollux and Castor, the open cluster Messier 35, the planetary nebula known as the Medusa Nebula, and the supernova remnant IC 443 (the Jellyfish Nebula).| www.constellation-guide.com
Columba is a faint constellation located in the southern sky. It represents the dove. The constellation is home to the runaway star Mu Columbae, the barred spiral galaxy NGC 1808, and the globular cluster NGC 1851.| www.constellation-guide.com
Denebola, Beta Leonis (β Leo), is a white main sequence star located at a distance of 35.9 light years from Earth in the constellation Leo. It marks the Lion's tail.| Star Facts
Cygnus, the Swan, is one of the largest northern constellations. Recognizable for the Northern Cross, it is home to the bright supergiant Deneb, the North America Nebula (NGC 7000) and the Gamma Cygni Nebula (IC 1318).| www.constellation-guide.com
Zubenelgenubi, Alpha2 Librae (α2 Lib), is a spectroscopic binary star located at a distance of 75.8 light years from Earth in the constellation Libra.| Star Facts
Libra is one of the southern zodiac constellations. It is home to Methuselah Star (HD 140283), one of the oldest stars known, the nearby red dwarf Gliese 581, and the barred spiral galaxies NGC 5885 and NGC 5792.| www.constellation-guide.com
Hercules is one of the largest constellations in the sky. Representing the mythical Greek hero, the constellation is home to the Hercules Globular Cluster (M13), the globular cluster Messier 92, and the Hercules Cluster of galaxies.| www.constellation-guide.com
Boötes (the Herdsman or Plowman) is a large northern constellation dominated by a kite-shaped asterism. The constellation is home to Arcturus, the brightest northern star, and the contrasting double star Izar.| www.constellation-guide.com
Asterisms are defined as patterns formed by stars of one or more constellations. These star patterns are commonly recognized by observers across the world and once served as a basis for the modern 88 constellations.| www.constellation-guide.com
Cassiopeia is a prominent constellation in the northern sky. Recognizable for its W shape, the constellation is home to the Heart Nebula, the Soul Nebula, the Pacman Nebula, and the open clusters Messier 52 and Messier 103.| www.constellation-guide.com
Puppis is a constellation located in the southern hemisphere. Home to many notable stars, it represents the stern of the ship Argo, on which Jason and the Argonauts sailed to get the Golden Fleece.| www.constellation-guide.com
Leo is one of the largest constellations in the northern sky. It is home to Regulus, one of the brightest stars in the sky, the nearby red dwarf Wolf 359, and the Leo Triplet of galaxies.| www.constellation-guide.com
Canopus, Alpha Carinae (α Car), is a white bright giant star located at a distance of 310 light years from Earth in the constellation Carina. It is the second brightest star in the sky.| Star Facts
Eridanus is one of the largest constellations in the sky. It represents the celestial river. It is home to Achernar, one of the brightest stars in the sky, the nearby star Epsilon Eridani, and the Witch Head Nebula (IC 2118).| www.constellation-guide.com
Sirius, Alpha Canis Majoris (α CMa), is the brightest star in the sky. The Sirius star system lies at a distance of 8.6 ly from Earth in the constellation Canis Major. It can be found using the stars of Orion's Belt.| Star Facts
Messier 45 (M45), also known as the Pleiades or Seven Sisters, is a bright open star cluster located in the constellation Taurus, the Bull. The Pleiades cluster has an apparent magnitude of 1.6 and lies at an average distance of 444 light years from Earth. The cluster is also known as Melotte 22. It does… Read More »Messier 45: Pleiades| Messier Objects
Lyra is a small constellation in the northern sky. It represents the lyre of Orpheus. The constellation is home to Vega, the second brightest northern star, and the Ring Nebula (M57), a famous planetary nebula.| www.constellation-guide.com
Polaris (α UMi), the North Star, is a yellow supergiant located 446 light-years away in the constellation Ursa Minor. The star is part of the Little Dipp| Star Facts
Fomalhaut, Alpha Piscis Austrini (α PsA), is a white main sequence star located 25 light-years away in the constellation Piscis Austrinus. Its hosts a planet, Dagon (Fomalhaut b), and is known for its vast debris disk.| Star Facts
Regulus, Alpha Leonis (α Leo), is a multiple star system located at a distance of 79.3 ly from Earth in the constellation Leo. It marks the heart of the celestial Lion.| Star Facts
Achernar, Alpha Eridani (α Eri), is a rapidly rotating star located 139 ly from Earth in Eridanus constellation. It is 3,150 times more luminous than the Sun.| Star Facts
Alpha Centauri (α Cen) is a triple star system located at a distance of 4.37 light years from Earth in the constellation Centaurus. It is the nearest star system to the Sun and hosts the nearest extrasolar planets to Earth.| Star Facts
Caph, Beta Cassiopeiae (β Cas) is a white giant star located at a distance of 54.7 light years from Earth in the constellation Cassiopeia. It is the rightmost star of Cassiopeia's W.| Star Facts
Alderamin, Alpha Cephei (α Cep), is a white main sequence star located at a distance of 49.05 light years from Earth in the constellation Cepheus.| Star Facts
Aquila, the Eagle, is a prominent northern constellation located near the celestial equator. It contains the bright Altair and the planetary nebulae NGC 6741 (the Phantom Streak Nebula) and NGC 6751 (the Glowing Eye Nebula).| www.constellation-guide.com
The Summer Triangle is a northern summer asterism formed by the brightest stars in the constellations Lyra, Aquila and Cygnus. It can be used to find some of the best-known nebulae in the sky.| www.constellation-guide.com
The life cycle of a star is the process of change in structure and composition that every star undergoes over time. It can last for a few million years or trillions of years, depending on the star’s mass.| Star Facts
Altair, Alpha Aquilae (α Aql), is a white main sequence star located 16.73 ly from Earth in the constellation Aquila. It forms the Summer Triangle with Vega and Deneb.| Star Facts
Deneb (α Cyg) is a blue-white supergiant located 2,615 light-years from Earth in the constellation Cygnus. The luminous star forms the Summer Triangle with Vega and Altair.| Star Facts