Castor, Alpha Geminorum (α Gem), is a sextuple star system located at a distance of 51 ly from Earth in the constellation Gemini. It consists of three binary pairs.| Star Facts
The largest stars in the known universe, listed here, are mostly cool red supergiants and hypergiants. Their radii are notoriously difficult to measure for several reasons.| Star Facts
Barnard’s Star (Gliese 699) is a red dwarf located only 5.96 light-years away in the constellation Ophiuchus. It is the fourth nearest individual star to Earth, after the three components of the Alpha Centauri system.| Star Facts
Epsilon Indi (ε Ind) is a star system located only 11.867 light-years from the Sun in the southern constellation Indus. With an apparent magnitude of 4.8310, it is visible to the unaided eye.| Star Facts
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
The Coalsack Nebula is one of the best known dark nebulae in the sky, located in the constellation Crux.| www.constellation-guide.com
Learn about the 88 modern constellations, their names, history, how to identify them, why we see different constellations at different times of year, and other fun facts.| www.constellation-guide.com
Piscis Austrinus is a small constellation in the southern sky. It represents the Southern Fish. It is home to Fomalhaut, one of the brightest stars in the sky.| www.constellation-guide.com
Menkent, Theta Centauri (θ Cen), is an orange giant star located at a distance of 58.8 light years from Earth in the constellation Centaurus.| Star Facts
Acrux, Alpha Crucis (α Cru), is a multiple star system located at a distance of 320 ly from Earth in the constellation Crux. It is the brightest star of the Southern Cross.| Star Facts
Hydra is the largest constellation in the sky. Located in the southern celestial hemisphere, the constellation contains the open cluster Messier 48, the Porpoise Galaxy (NGC 2936), and the Southern Pinwheel Galaxy (M83).| www.constellation-guide.com
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
Southern constellations are the 52 constellations located in the southern celestial hemisphere.| 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
Mimosa, Beta Crucis (β Cru), is a multiple star system located at a distance of 280 ly in the constellation Crux. It is one of the stars of the Southern Cross.| Star Facts
Imai, Delta Crucis (δ Cru) is a blue-white subgiant star located at a distance of 345 ly in the constellation Crux. It is one of the stars of the Southern Cross.| Star Facts
Gacrux, Gamma Crucis (γ Cru), is a red giant star located at a distance of 88.6 ly in the constellation Crux. It is one of the stars that form the Southern Cross.| Star Facts
Crux is the smallest and most distinctive constellation in the southern sky. Recognizable for the Southern Cross, formed by its brightest stars, it is home to the dark Coalsack Nebula and the Jewel Box Cluster (NGC 4755).| www.constellation-guide.com
Aspidiske, Iota Carinae (ι Car) is a white supergiant star located 690 light years away in the southern constellation Carina. It is one of the four bright stars that form the False Cross.| Star Facts
Alsephina, Delta Velorum Aa (δ Vel Aa), is the primary component in a triple star system located 80.6 ly away in the constellation Vela. It is one of the four stars that form the False Cross.| Star Facts
The False Cross is an asterism formed by four bright stars in the constellations Vela and Carina. Located in the far southern sky, the diamond-shaped pattern is often confused for the brighter Southern Cross.| www.constellation-guide.com
Carina is a constellation in the southern sky. It represents the keel of the ship Argo. It is home to Canopus, the second brightest star in the sky, and Eta Carinae, a massive star illuminating the Carina Nebula.| www.constellation-guide.com
The list of the 88 modern constellations officially recognized by the International Astronomical Union (IAU), along with their English names, sizes, quadrants and the latitudes between which they are fully visible.| www.constellation-guide.com
Centaurus A is a peculiar galaxy located in the southern constellation Centaurus. It is the fifth brightest galaxy in the night sky, the nearest giant galaxy to the Milky Way, and one of the nearest radio galaxies to Earth.| 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
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
Gamma Centauri (γ Cen) is a binary star system located 130 light-years away in the constellation Centaurus. The system has the traditional name Muhlifain. It is the fourth brightest point of light in Centaurus.| Star Facts
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
Vela is a constellation in the southern sky. It represents the sails of Argo Navis, the mythical ship of Jason and the Argonauts. The constellation contains the Vela Supernova Remnant, the Eight-Burst Nebula, and the Omicron Velorum Cluster| www.constellation-guide.com
Avior, Epsilon Carinae (ε Car), is a double star located at a distance of 610 light years from Earth in the southern constellation Carina.| Star Facts
Markeb, Kappa Velorum (κ Vel), is a spectroscopic binary star located 570 light years away in the constellation Vela. It is one of the four bright stars that form the False Cross.| Star Facts
Suhail, Lambda Velorum (λ Vel) is an orange supergiant star located at a distance of 545 light years from Earth in the constellation Vela.| Star Facts
Rigel (β Ori) is a blue-whlue-white supergiant star located 848 light-years away in the constellation Orion. It is the most luminous star within 1,000 ly of Earth.| Star Facts
Orion, the Hunter, is one of the best known constellations in the sky. Home to Orion's Belt, the Orion Nebula, and the bright stars Rigel and Betelgeuse, the constellation lies north of the celestial equator and is visible from both hemispheres.| www.constellation-guide.com
Canis Major is a constellation in the southern sky. It represents the bigger dog following Orion, the Hunter. The constellation is home to Sirius, the brightest star in the sky, and the Canis Major Dwarf Galaxy.| www.constellation-guide.com
Centaurus is a large constellation located in the southern celestial hemisphere. It is home to Alpha Centauri, the nearest star system to Earth, the bright galaxy Centaurus A, and the globular cluster Omega Centauri.| www.constellation-guide.com
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
40 Eridani (Keid) is a triple star system located 16.34 light-years away in the constellation Eridanus. In Star Trek lore, primary component is the host star of the planet Vulcan.| Star Facts
Segin (ε Cas) is a blue-white star located at a distance of 410 light years from Earth in the constellation Cassiopeia. It is the leftmost star of Cassiopeia's W.| Star Facts
Omega Centauri (Caldwell 80, NGC 5139) is the largest and most massive globular cluster in the Milky Way galaxy. With an apparent magnitude of 3.9, the cluster is easily visible to the unaided eye.| www.constellation-guide.com
The W-shaped asterism formed by the five brightest stars of Cassiopeia is one of the most familiar features of the northern night sky. It is used to find the Heart and Soul Nebulae, the Double Cluster, the open clusters M52 and M103, and many other deep sky objects.| www.constellation-guide.com
Carina Nebula (NGC 3372, Caldwell 92) is a large region of bright and dark nebulosity located 8,500 light-years in the constellation Carina. It hosts Eta Carinae, one of the most massive and luminous stars known.| www.constellation-guide.com
Sagittarius is a large constellation in the southern sky. It is one of the constellations of the zodiac. It contains the Milky Way centre and some of the best known nebulae in the sky.| www.constellation-guide.com
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
Acamar, Theta Eridani (θ Eri), is a binary star system consisting of two white class A stars located at a distance of 161 light years from Earth in the constellation Eridanus.| Star Facts
The Southern Cross is a bright, diamond-shaped asterism located in the far southern sky. Formed by the brightest stars of the constellation Crux, the asterism is commonly used to find the south celestial pole.| www.constellation-guide.com
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
Rigil Kentaurus, Alpha Centauri A (α Cen A), is a Sun-like yellow main sequence star located at a distance of 4.37 light years from Earth in the constellation Centaurus. It is the primary component of Alpha Centauri, the nearest star system to the solar system.| Star Facts
The list of the 300 brightest stars in the night sky, along with the stars' Bayer designations, apparent magnitudes, distances, and spectral types.| Star Facts
Scorpius is a zodiac constellation located in the southern sky. It is home to Antares, one of the brightest stars in the sky, and to the bright open clusters Messier 6 (the Butterfly Cluster) and Messier 7 (Ptolemy's Cluster).| www.constellation-guide.com
Kaus Australis, Epsilon Sagittarii (ε Sgr), is a binary star located at a distance of 143 light years in the constellation Sagittarius. It is the constellation's brightest star.| Star Facts
Hadar, Beta Centauri (β Cen), is a triple star system located at a distance of 390 light years from Earth in the southern constellation Centaurus.| Star Facts
Shaula, Lambda Scorpii (λ Sco), is a triple star system located 570 light years away in the constellation Scorpius. It marks the celestial Scorpion's stinger.| Star Facts
Proxima Centauri, Alpha Centauri C (α Cen C), is a red dwarf star located at a distance of 4.244 light years from Earth in the constellation Centaurus. It is the nearest star to the Sun and hosts the two nearest planets, Proxima b and Proxima c.| 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
Vega (Alpha Lyrae) is a fast-spinning white main sequence star located 25.04 light-years away in the constellation Lyra. Shining at magnitude 0.026, it is the fifth brightest star in the sky. It forms the Summer Triangle with Altair and Deneb.| Star Facts
Greek constellations are the 48 ancient constellations listed by the Greek astronomer Claudius Ptolemy in his Almagest in the 2nd century CE. Most of them are associated with stories from Greek mythology.| www.constellation-guide.com
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