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Any object such as a star or nebula known to exist in the universe..
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| x name | x image | x Magnitude | x Declination (°) | x Right Ascension (°) | x article |
| x Moon |
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-12.74 |
The Moon is the earth's companion satellite, though some astronomers believe that it approaches being a planet in its own right. The Moon is large enough for its gravity to affect the Earth, stabilising its orbit and producing the regular ebb and...
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| x Mars |
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Mars is the fourth planet from the Sun in the Solar System. The planet is named after Mars, the Roman god of war. It is also referred to as the "Red Planet" because of its reddish appearance, due to iron oxide prevalent on its surface.
Mars is a...
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| x Venus |
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Venus is the second-closest planet to the Sun, orbiting it every 224.7 Earth days. The planet is named after Venus, the Roman goddess of love and beauty. After the Moon, it is the brightest natural object in the night sky, reaching an apparent...
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| x Mercury |
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Mercury is the innermost and smallest planet in the Solar System, orbiting the Sun once every 87.969 days. The orbit of Mercury has the highest eccentricity of all the Solar System planets, and it has the smallest axial tilt. It completes three...
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| x Jupiter |
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Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. It is a gas giant with a mass slightly less than one-thousandth that of the Sun but is two and a half times the mass of all of the other planets in our Solar...
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| x Saturn |
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Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter. Saturn, along with Jupiter, Uranus and Neptune, is classified as a gas giant. Together, these four planets are sometimes referred to as the...
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| x Neptune |
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Neptune is the eighth planet from the Sun in our Solar System. Named for the Roman god of the sea, it is the fourth-largest planet by diameter and the third-largest by mass. Neptune is 17 times the mass of Earth and is slightly more massive than its...
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| x Earth |
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Earth (or the Earth) is the third planet from the Sun, and the fifth-largest of the eight planets in the Solar System. It is also the largest, most massive, and densest of the Solar System's four terrestrial (or rocky) planets. It is sometimes...
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| x Beta Ursae Majoris |
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Beta Ursae Majoris (β UMa / β Ursae Majoris) is a star in the constellation of Ursa Major. It has the traditional name Merak.
It is more familiar to northern hemisphere observers as one of the "pointer stars" in the Big Dipper, and a line connecting...
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| x Polaris |
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Polaris (α UMi / α Ursae Minoris / Alpha Ursae Minoris, commonly North(ern) Star or Pole Star, or Dhruva Tara and sometimes Lodestar) is the brightest star in the constellation Ursa Minor. It is very close to the north celestial pole (42′ away as of...
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| x Uranus |
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Uranus is the seventh planet from the Sun, and the third-largest and fourth most massive planet in the Solar System. It is named after the ancient Greek deity of the sky Uranus (Ancient Greek: Οὐρανός) the father of Kronos (Saturn) and grandfather...
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| x Sun |
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The Sun is the star at the center of the Solar System. The Sun has a diameter of about 1,392,000 kilometres (865,000 mi) (about 109 Earths), and by itself accounts for about 99.86% of the Solar System's mass; the remainder consists of the planets ...
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| x GJ 388 |
GJ 388 (AD Leonis) is a red dwarf star. It is located relatively near the Sun, at a distance of about 16 light years, in the constellation Leo.
This is a main sequence star with a spectral classification of M3.5V. It is about 39–42% of the Sun's...
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| x Epsilon Sagittarii |
Epsilon Sagittarii (ε Sgr / ε Sagittarii) is a binary star that lies 144.64 light-years distant in the constellation Sagittarius. It has a faint, 14th magnitude companion, Epsilon Sagittarii B, 32 arcseconds distant.
The star forms the base of the...
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| x J Centauri |
J Centauri (J Cen) is a star in the constellation Centaurus. It is approximately 350 light years from Earth.
J Centauri is a spectral class B3V main sequence star with a mean apparent magnitude of 4.5 and a luminosity 500 times that of the Sun. The...
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| x Alpha Leporis |
Alpha Leporis (α Lep / α Leporis) is the brightest star in the constellation Lepus. It has the traditional name Arneb, from the Arabic أرنب ’arnab "hare".
Alpha Leporis is an older, dying star that may have already passed through a supergiant phase...
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| x 14 Herculis |
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14 Herculis is an orange dwarf star approximately 59 light-years away in the constellation Hercules. Because of its apparent magnitude, the star cannot be seen with the naked eye. As of 2006, it is thought that 14 Herculis has two extrasolar planets...
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| x Procyon |
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Procyon (α CMi / α Canis Minoris / Alpha Canis Minoris) is the brightest star in the constellation Canis Minor. To the naked eye, it appears to be a single star, the seventh brightest in the night sky with a visual apparent magnitude of 0.34. It is...
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| x YZ Ceti |
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YZ Ceti is a red dwarf star in the constellation Cetus. Although it is relatively close to the Sun at just over 12 light years, this star can not be seen with the naked eye. It is classified as a flare star that undergoes intermittent fluctuations...
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| x La Superba |
La Superba (Y CVn / Y Canum Venaticorum) is a star in the constellation Canes Venatici, well-known for its strikingly red appearance.
La Superba is a semi-regular variable star, peaking at about +4.8 mag and diminishing to around +6.3 over a 160 day...
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| x HD 224693 |
HD 224693 (also known as HIP 118319) is a yellow subgiant star approximately 307 light-years away in the constellation Cetus.
As of 2006, an extrasolar planet is known to orbit HD 224693.
Johnson et al. (April 2006). "The N2K Consortium. VI. Doppler...
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| x Eta Ophiuchi |
Eta Ophiuchi (η Oph / η Ophiuchi) is a star in the constellation Ophiuchus. It also has the traditional name Sabik.
η Oph is actually a binary star system that is difficult to resolve in amateur telescopes but whose true nature has been determined...
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| x Chi1 Orionis |
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Chi Orionis (χ Ori / χ Orionis) is a star about 32 light years away. It is in the constellation Orion.
χ Ori is a main sequence dwarf star of spectral type G0V. It has a faint companion with a mass estimated at about 15% of the mass of the Sun, an...
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| x Gliese 673 |
Gliese 673 is a cool, orange dwarf star in the constellation Ophiuchus. The estimates of its stellar classification range from K5 to K7. Main sequence stars with this spectra have a mass in the range of 60-70% of a solar mass (comparable to the...
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| x Rho Cassiopeiae |
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Rho Cassiopeiae (ρ Cas / ρ Cassiopeiae, pronounced /.roʊ kæsiəˈpiː.iː/) is a yellow hypergiant star in the constellation Cassiopeia. It is about 11,650 light-years (3,570 pc) away from Earth, yet can still be seen by the naked eye (in the Northern...
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| x HD 38529 |
HD 38529 (also known as HR 1988) is a binary star approximately 138 light-years away in the constellation of Orion.
HD 38529 A is a yellow subgiant star, which has also been classified as a main sequence dwarf of spectral type G4V. It is about 40%...
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| x 82 Eridani |
82 Eridani is a star about 20 light years away from Earth. It is in constellation Eridanus. It is a main sequence star of spectral type G5.
82 G. Eridani (often abbreviated "82 Eridani") is the 82nd star in Eridanus in the now-obscure catalog...
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| x Rigel |
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Rigel (β Ori / β Orionis / Beta Orionis) is the brightest star in the constellation Orion and the sixth brightest star in the sky, with visual magnitude 0.18. Although it has the Bayer designation "beta", it is almost always brighter than Alpha...
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| x VV Cephei |
VV Cephei is an eclipsing binary star system located in the constellation Cepheus, approximately 2,400 light years from Earth. A red hypergiant fills the system's Roche lobe when closest to its companion blue star, the latter appearing to be on the...
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| x Iota Persei |
Iota Persei (ι Per / ι Persei) is a main sequence dwarf star in the constellation Perseus. It is somewhat larger and greater in mass than the Sun, and is located about 34 light years distant. Iota Persei has a relatively high proper motion across...
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| x HD 211415 |
HD 211415 is a binary star system in the constellation Grus. It has a relatively high proper motion and is located about 44 light years from the Sun.
These two stars have an orbit with a semi-major axis of 3.4″, which is approximately equal to 46 A...
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| x Achernar |
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Achernar (α Eri / α Eridani / Alpha Eridani), sometimes spelled Achenar, is the brightest star in the constellation Eridanus and the ninth-brightest star in the nighttime sky. Of the top ten apparent brightest stars (excluding our Sun): Sirius,...
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| x HR 753 |
HR 753 (Harvard Revised 753) is a triple star system in the constellation of Cetus. It is located relatively near the Sun at an estimated distance of less than 24 light years, but even the brightest component is too faint to see directly with the...
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| x 79 Ceti |
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79 Ceti (also known as HD 16141) is a yellow subgiant star approximately 117 light-years away in the constellation Cetus. It has stopped hydrogen fusion in its core, this implies an age much higher than our Sun's 4.5 billion years. Eventually the...
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| x SCR 1845-6357 |
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SCR 1845-6357 is a binary system, about 12.6 light-years away in the constellation Pavo. The primary is a faint red dwarf star. It has a brown dwarf companion.
The primary, SCR 1845-6357A, is a faint (apparent magnitude 17.4) red dwarf star with a...
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| x HD 149026 |
HD 149026 is a yellow subgiant star approximately 257 light-years away in the constellation of Hercules. The star is thought to be much more massive, larger, and brighter than the Sun. As of 2005, an extrasolar planet has been confirmed to be...
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| x L Centauri |
HD 110073 (Bayer designation l Cen / l Centauri) is a star in the constellation Centaurus. It is a blue-white B-type bright giant with an apparent magnitude of +4.63 and is approximately 355 light years from Earth.
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| x 25 Arietis |
25 Arietis is a star in the constellation Cetus. Its apparent magnitude is +6.45.
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| x 100 Aquarii |
100 Aquarii (100 Aqr) is a star in the constellation of Aquarius.
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| x Gamma Velorum |
Gamma Velorum (γ Vel / γ Velorum) is a star system in the constellation Vela. At magnitude +1.7, it is one of the brightest stars in the nighttime sky. It has the traditional names Suhail and Suhail al Muhlif, which confusingly also apply to Lambda...
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| x Delta Cygni |
Delta Cygni (δ Cyg / δ Cygni) is a third-magnitude star in the constellation Cygnus. Delta Cygni will be the "North Star" for at least four centuries around 11,250 A.D.
This star has carried the now obsolete proper names Ruc (Rukh) and Urakhga, both...
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| x Phi Cassiopeiae |
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Phi Cassiopeiae (φ Cas / φ Cassiopeiae) is a star in the constellation Cassiopeia. φ Cassiopeiae is a yellow-white F-type supergiant with an apparent magnitude of +4.95. It is approximately 2300 light years from Earth. It appears among the stars of...
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| x 1 Aurigae |
1 Aurigae or 1 Aur is a star in the constellation Auriga.
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| x Mu-1 Cancri |
Mu-1 Cancri (μ Cnc / μ Cancri) is a red giant star approximately 561 light-years away from the solar system, in the constellation Cancer. The name Mu-1 cames from the bayer naming system, the "1" in the name is because (from Earth) it appears to be...
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| x Van Maanen's star |
Van Maanen's star is a white dwarf star. Out of the white dwarfs known, it is the third closest to the Sun, after Sirius B and Procyon B, in that order, and the closest known solitary white dwarf. Discovered in 1917 by Adriaan van Maanen, Van Maanen...
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| x Alpha Ursae Majoris |
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Alpha Ursae Majoris (α UMa / α Ursae Majoris) is the second-brightest star in the constellation of Ursa Major (despite its Bayer designation of "alpha"). It has the traditional name Dubhe, and a rarer name Ak.
It forms part of the Big Dipper (also...
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| x Regulus |
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Regulus (α Leo / α Leonis / Alpha Leonis) is the brightest star in the constellation Leo and one of the brightest stars in the nighttime sky, and lies approximately 77.5 light years from Earth. Regulus is a multiple star system composed of four...
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| x Wolf 424 |
Wolf 424 is a binary star system comprising two red dwarf stars at a distance of approximately 14.2 light years from the Sun. It is located in the constellation Virgo, between the stars ε Virginis and δ Virginis.
The Wolf 424 system has a semi-major...
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| x Epsilon Centauri |
Epsilon Centauri (ε Cen / ε Centauri) is a star in the constellation Centaurus. It has the traditional names Al birdhaun or Birdun.
ε Centauri is a blue-white B-type giant with a mean apparent magnitude of +2.29. It is classified as a Beta Cephei...
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| x Altair |
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Altair (Alpha Aquilae / Alpha Aql / α Aquilae / α Aql / Atair) is the brightest star in the constellation Aquila and the twelfth brightest star in the night sky. It is an A-type main sequence star with an apparent visual magnitude of 0.77 and is one...
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| x Gamma Cygni |
Gamma Cygni (γ Cyg / γ Cygni) is a star in the constellation Cygnus. It has the traditional name Sadr (also spelled Sadir or Sador).
The traditional name comes from the Arabic word صدر şadr, "chest", the same word which gave rise to the star Schedar...
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| x M Centauri |
M Centauri (M Cen) is a binary star in the constellation Centaurus. It is approximately 257 light years from Earth.
M Centauri is a yellow G-type giant with an apparent magnitude of +4.64. It is a spectroscopic binary with an orbital period of 437...
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| x Epsilon Carinae |
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Epsilon Carinae (ε Car / ε Carinae) is a star in the constellation Carina. At apparent magnitude +1.86 it is one of the brightest stars in the nighttime sky, but is not visible from the northern hemisphere.
It is also known by the name Avior, but...
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| x Gamma Centauri |
Gamma Centauri (γ Cen / γ Centauri) is a star in the constellation Centaurus. It has the proper name Muhlifain, not to be confused with Muliphein, which is γ Canis Majoris; both names derive from the same Arabic root.
Gamma Centauri is a double star...
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| x AB Doradus |
AB Doradus is a pre-main sequence ternary star system in the constellation Dorado. The primary is a flare star that shows periodic increases in activity.
The primary star in this system spins at a rate 50 times that of the Sun, and consequently has...
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| x Iota Carinae |
Iota Carinae (ι Car / ι Carinae) is a star in the constellation Carina. It is one of the brighter stars in the nighttime sky.
It has the traditional names Aspidiske, Scutulum and Turais (Tureis). Turais is from the Arabic تُرَيْس turais "shield ...
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| x Sirius |
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Sirius is the brightest star in the night sky. With a visual apparent magnitude of −1.46, it is almost twice as bright as Canopus, the next brightest star. The name Sirius is derived from the Ancient Greek Σείριος. The star has the Bayer designation...
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| x HD 111968 |
HD 111968, also known by the Bayer designation n Centauri (n Cen), is a star in the constellation Centaurus.
n Centauri is a white A-type giant with an apparent magnitude of +4.25. It is approximately 155.1 light years from Earth.
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| x Zeta Trianguli Australis |
Zeta Trianguli Australis (ζ TrA) is a spectroscopic binary in the constellation Triangulum Australe. It is approximately 39.5 light years from Earth.
The system is composed of two main sequence stars, one a yellow-white F-type dwarf and the other a...
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| x Eta Centauri |
Eta Centauri (η Cen / η Centauri) is a star in the constellation Centaurus.
This is a rapidly rotating star that completes a full rotation in less than a day. It is also a Be star, which means it has variable emissions in its hydrogen spectral lines...
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