"Association. Standing out by its red hue, Betelgeuse may nevertheless be a runaway member of the same group. Of the lesser stars, Meissa (or Lambda Orionis) forms Orion's head, whilst Hatsya (or Iota Orionis) forms the tip of Orion's sword. Iota Orionis is also called ""Nair al-Saif"", Arabic for ""the brightest in the sword"". Orion's Belt or The Belt of Orion is an asterism within the constellation. It consists of the three bright stars Zeta (Alnitak), Epsilon (Alnilam), and Delta (Mintaka). Alnitak is around 800 light years away from earth and is 100,000 times more luminous than the Sun; much"
"in the IAU Catalog of Star Names. The three belt stars were collectively known by many names in many cultures. Arabic terms include ""Al Nijād"" 'the Belt', ""Al Nasak"" 'the Line', ""Al Alkāt"" 'the Golden Grains or Nuts' and, in modern Arabic, ""Al Mīzān al H•akk"" 'the Accurate Scale Beam'. In Chinese mythology they were also known as The Weighing Beam. In Chinese, (), meaning ""Three Stars (asterism)"", refers to an asterism consisting of Alnilam, Alnitak, Mintaka (Orion's Belt) with Betelgeuse, Bellatrix, Saiph and Rigel Consequently, Alnilam are known as (, ).. It is one of the western mansions of"
"Beta Monocerotis Beta Monocerotis (Beta Mon, β Monocerotis, β Mon) is a triple star system in the constellation of Monoceros. To the naked eye, it appears as a single star with an apparent visual magnitude of approximately 3.74, making it the brightest visible star in the constellation. A telescope shows a curved line of three pale blue stars (or pale yellow stars, depending on the scope's focus). William Herschel who discovered it in 1781 commented that it is ""one of the most beautiful sights in the heavens"". The star system consists of three Be stars, β Monocerotis A, β Monocerotis"
"Triangulum Triangulum is a small constellation in the northern sky. Its name is Latin for ""triangle"", derived from its three brightest stars, which form a long and narrow triangle. Known to the ancient Babylonians and Greeks, Triangulum was one of the 48 constellations listed by the 2nd century astronomer Ptolemy. The celestial cartographers Johann Bayer and John Flamsteed catalogued the constellation's stars, giving six of them Bayer designations. The white stars Beta and Gamma Trianguli, of apparent magnitudes 3.00 and 4.00, respectively, form the base of the triangle and the yellow-white Alpha Trianguli, of magnitude 3.41, the apex. Iota Trianguli"
"for 'belt': منطقة or ""manṭaqa"". In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016 included a table of the first two batches of names approved by the WGSN; which included ""Mintaka"" for this star. It is now so entered in the IAU Catalog of Star Names. Mintaka is the westernmost of the three stars of Orion's belt. It is easily visible to the naked eye, one of the brightest stars in the sky, and has been known since antiquity. Radial"
"entered in the IAU Catalog of Star Names. The three belt stars were collectively known by many names in many cultures. Arabic terms include النجاد ""Al Nijād"" 'the Belt', النسك ""Al Nasak"" 'the Line', العلقات ""Al Alkāt"" 'the Golden Grains or Nuts' and, in modern Arabic, ميزان الحق ""Al Mīzān al Ḥaqq"" 'the Accurate Scale Beam'. In Chinese mythology they were known as The Weighing Beam. The belt was also the Three Stars mansion (), one of the Twenty-eight mansions of the Chinese constellations. It is one of the western mansions of the White Tiger. In Chinese, (), meaning ""Three"
"is located about 5 degrees northwest of Alpha Trianguli. Triangulum Triangulum is a small constellation in the northern sky. Its name is Latin for ""triangle"", derived from its three brightest stars, which form a long and narrow triangle. Known to the ancient Babylonians and Greeks, Triangulum was one of the 48 constellations listed by the 2nd century astronomer Ptolemy. The celestial cartographers Johann Bayer and John Flamsteed catalogued the constellation's stars, giving six of them Bayer designations. The white stars Beta and Gamma Trianguli, of apparent magnitudes 3.00 and 4.00, respectively, form the base of the triangle and the yellow-white"
"that the coordinates were mistranscribed 32 in error by Flamsteed and in fact referred to 7.4 magnitude HD 10407. Baily also noted that 16 Trianguli was closer to Aries and included it in the latter constellation. Three stars make up the long narrow triangle that gives the constellation its name. The brightest member is the white giant star Beta Trianguli of apparent magnitude 3.00, lying 127 light-years distant from Earth. It is actually a spectroscopic binary system; the primary is a white star of spectral type A5IV with 3.5 times the mass of our sun that is beginning to expand"
"Mintaka and the reasons for it have yet to be clarified. Mintaka was seen by astrologers as a portent of good fortune. The three belt stars were collectively known by many names in many cultures. Arabic terms include ""Al Nijād"" 'the Belt', ""Al Nasak"" 'the Line', ""Al Alkāt"" 'the Golden Grains or Nuts' and, in modern Arabic, ""Al Mīzān al H•akk"" 'the Accurate Scale Beam'. In Chinese mythology they were also known as The Weighing Beam. In Chinese, (), meaning ""Three Stars (asterism)"", refers to an asterism consisting of Mintaka, Alnilam, Alnitak, (Orion's Belt) with Betelgeuse, Bellatrix, Saiph and Rigel"
"Leo Cluster The Leo Cluster (Abell 1367) is a galaxy cluster about 330 million light-years distant (z = 0.022) in the constellation Leo, with at least 70 major galaxies. The galaxy known as NGC 3842 is the brightest member of this cluster. Along with the Coma Cluster, it is one of the two major clusters comprising the Coma Supercluster, which in turn is part of the CfA2 Great Wall, which is hundreds of millions light years long and is one of the largest known structures in the universe. A team of scientists decided to observe the Leo Cluster with the"
"Electra (star) Electra, also designated 17 Tauri, is a blue-white giant star in the constellation of Taurus. It is the third-brightest star in the Pleiades open star cluster (M45); the most visible stars in this group are named for the Seven Sisters of Greek mythology. The star has an apparent brightness of 3.72, the third-brightest of the stars in the group. Electra belongs to the spectral class B6 IIIe and is approximately 400 light-years from the Sun. The Pleiades cluster is thought to be 444 light-years away. The projected rotational velocity of this star is 181 km/s, making it a"
"Zeta Sagittarii Zeta Sagittarii (ζ Sagittarii, abbreviated Zeta Sgr, ζ Sgr) is a triple star system and the third-brightest star in the constellation of Sagittarius. Based upon parallax measurements, it is about from the Sun. The three components are designated Zeta Sagittarii A (also named Ascella) and B, themselves forming a binary pair, and a smaller companion star, C. ""ζ Sagittarii"" (Latinised to ""Zeta Sagittarii"") is the system's Bayer designation. The designations of the two components as ""ζ Sagittarii A"", ""B"" and ""C"" derive from the convention used by the Washington Multiplicity Catalog (WMC) for multiple star systems, and adopted"
"Delta Herculis Delta Herculis (δ Herculis, abbreviated Delta Her, δ Her) is a multiple star system in the constellation of Hercules. Though it only shines with an apparent magnitude of 3.12, it is the third-brightest star in its constellation. Based on parallax measurement taken during the Hipparcos mission, it is approximately from the Sun. It consists of a binary pair, designated Delta Herculis A, together with three potential companions, designated Delta Herculis B, C and D, although 'B' is believed to be an optical companion. 'A's' components are themselves designated Delta Herculis Aa (also named Sarin) and Ab. ""δ Herculis"""
"Stars (asterism)"", refers to an asterism consisting of Alnitak, Alnilam, Mintaka (Orion's Belt) with Betelgeuse, Bellatrix, Saiph and Rigel Consequently, Alnitak are known as (, ).. It is one of the western mansions of the White Tiger. The ""USS Alnitah"" was a United States Navy ""Crater""-class cargo ship named after the star. Alnitak Alnitak, designated Zeta Orionis (ζ Orionis, abbreviated Zeta Ori, ζ Ori) and 50 Orionis (50 Ori), is a multiple star several hundred parsecs from the Sun in the constellation of Orion. It is one of the three main stars of Orion's Belt along with Alnilam and Mintaka."
"Gould Belt The Gould Belt is a partial ring of stars in the Milky Way, about 3000 light years across, tilted toward the galactic plane by about 16 to 20 degrees. It contains many O- and B-type stars, and may represent the local spiral arm to which the Sun belongs—currently the Sun is about 325 light years from the arm's center. The belt is thought to be from 30 to 50 million years old, and of unknown origin. It is named after Benjamin Gould, who identified it in 1879. The belt contains bright stars in many constellations including (in order"
"star he designated in the neighbouring constellation Crater—31 Crateris—lay within Corvus once the constellation boundaries were established in 1930. Within the constellation's borders, there are 29 stars brighter than or equal to apparent magnitude 6.5. Four principal stars, Delta, Gamma, Epsilon, and Beta Corvi, form a quadrilateral asterism known as ""the ""Spica's Spanker"" or ""the Sail"". Although none of the stars are particularly bright, they lie in a dim area of the sky, rendering the asterism easy to distinguish in the night sky. Gamma and Delta serve as pointers toward Spica. Also called Gienah, Gamma is the brightest star in"
"from every location on Earth except within the Antarctic circle. The red giant Gamma Sagittae is the constellation's brightest star, with an apparent magnitude of 3.47. Two star systems have been found to have planets. The Greeks who may have originally identified this constellation called it ""Oistos"". The Romans named it Sagitta. Sagitta's shape is reminiscent of an arrow, and many cultures have interpreted it thus, among them the Persians, Hebrews, Greeks and Romans. The Arabs called it ""as-Sahm"", a name that was transferred ""Sham"" and now refers to Alpha Sagittae only. In ancient Greece, Sagitta was regarded as the"
"030323 lasted 26 seconds, and was detected on 23 March 2003. USS ""Crater"" (AK-70) was a United States Navy Crater class cargo ship named after the constellation. Crater (constellation) Crater is a small constellation in the Southern Celestial Hemisphere. Its name means ""cup"" in Latin. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it depicts a cup that has been associated with the god Apollo and is perched on the back of Hydra the water snake. There is no star brighter than third magnitude. Its two brightest stars, Delta Crateris of magnitude 3.56 and Alpha Crateris of"
"as Atria, is a second-magnitude orange giant and the brightest star in the constellation, as well as the 42nd-brightest star in the night sky. Completing the triangle are the two white main sequence stars Beta and Gamma Trianguli Australis. Although the constellation lies in the Milky Way and contains many stars, deep-sky objects are not prominent. Notable features include the open cluster NGC 6025 and planetary nebula NGC 5979. Italian navigator Amerigo Vespucci explored the New World at the beginning of the 16th century. He learnt to recognize the stars in the southern hemisphere and made a catalogue for his"
"Beta Trianguli Beta Trianguli (Beta Tri, β Trianguli, β Tri) is the Bayer designation for a binary star system in the constellation Triangulum, located about 127 light years from Earth. Although the apparent magnitude is only 3.0, it is the brightest star in the constellation Triangulum. This is a double-lined spectroscopic binary star system with an orbital period of 31.39 days and an eccentricity of 0.53. The members are separated by a distance of less than 5 AU. The primary component has a stellar classification of A5IV, indicating that it has evolved away from the main sequence and is now"
"Beta Trianguli Beta Trianguli (Beta Tri, β Trianguli, β Tri) is the Bayer designation for a binary star system in the constellation Triangulum, located about 127 light years from Earth. Although the apparent magnitude is only 3.0, it is the brightest star in the constellation Triangulum. This is a double-lined spectroscopic binary star system with an orbital period of 31.39 days and an eccentricity of 0.53. The members are separated by a distance of less than 5 AU. The primary component has a stellar classification of A5IV, indicating that it has evolved away from the main sequence and is now"
"the Chinese also associated these stars with battle armor, incorporating them into the larger asterism known as ""Tien Pien"", i.e., the Heavenly Casque (or Helmet). Scutum is not a bright constellation, with the brightest star, Alpha Scuti, at magnitude 3.85. But some stars are notable in the constellation. Beta Scuti is the second brightest at magnitude 4.22, followed by Delta Scuti at magnitude 4.72. Beta Scuti is a binary system, with the primary with a spectral type similar to the Sun, although it is 1,270 times brighter. Delta Scuti is a bluish white giant star, which is now coming at"
"barren constellation, with few objects of interest. The constellation's brightest star, Alpha Caeli, is only of magnitude 4.45, and only one other star, (Gamma) γ Caeli, is brighter than magnitude 5. Other notable objects in Caelum are RR Caeli, a binary star with one known planet approximately away; X Caeli, a Delta Scuti variable that forms an optical double with γ Caeli; and HE0450-2958, a Seyfert galaxy that at first appeared as just a jet, with no host galaxy visible. Caelum was first introduced in the eighteenth century by Nicolas Louis de Lacaille, a French astronomer who introduced thirteen other"
"Coma Cluster The Coma Cluster (Abell 1656) is a large cluster of galaxies that contains over 1,000 identified galaxies. Along with the Leo Cluster (Abell 1367), it is one of the two major clusters comprising the Coma Supercluster. It is located in and takes its name from the constellation Coma Berenices. The cluster's mean distance from Earth is 99 Mpc (321 million light years). Its ten brightest spiral galaxies have apparent magnitudes of 12–14 that are observable with amateur telescopes larger than 20 cm. The central region is dominated by two supergiant elliptical galaxies: NGC 4874 and NGC 4889. The"
"Mintaka Mintaka, also designated Delta Orionis (δ Orionis, abbreviated Delta Ori, δ Ori) and 34 Orionis (34 Ori) is a multiple star system some 1,200 light-years from the Sun in the constellation of Orion. Together with Alnitak (Zeta Orionis) and Alnilam (Epsilon Orionis), the three stars form Orion's Belt, known by many names among ancient cultures. When Orion is near the meridian, Mintaka is the right-most of the Belt's stars when viewed from the Northern Hemisphere facing south. ""Delta Orionis"" is the star's Bayer designation, ""34 Orionis"" its Flamsteed designation. The name ""Mintaka"" itself is derived from an Arabic term"
"Crater (constellation) Crater is a small constellation in the Southern Celestial Hemisphere. Its name means ""cup"" in Latin. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it depicts a cup that has been associated with the god Apollo and is perched on the back of Hydra the water snake. There is no star brighter than third magnitude. Its two brightest stars, Delta Crateris of magnitude 3.56 and Alpha Crateris of magnitude 4.07, are ageing orange giant stars that are cooler and larger than the Sun. Beta Crateris is a binary star system composed of a white main"
"of the Scorpius–Centaurus Association, a loose group of hot blue-white stars that appears to share a common origin and motion across the Milky Way. These include Alpha, Beta, Gamma, Zeta and (probably) Eta Muscae, as well as HD 100546, a blue-white Herbig Ae/Be star that is surrounded by a complex debris disk containing a large planet or brown dwarf and possible protoplanet. Two further star systems have been found to have planets. The constellation also contains two cepheid variables visible to the naked eye. Theta Muscae is a triple star system, the brightest member of which is a Wolf–Rayet star."
"mean separation of 13.4 AU. The binary pair have a faint, 10th magnitude companion, C, separated from them by a distance of 75 arcseconds. Zeta Sagittarii Zeta Sagittarii (ζ Sagittarii, abbreviated Zeta Sgr, ζ Sgr) is a triple star system and the third-brightest star in the constellation of Sagittarius. Based upon parallax measurements, it is about from the Sun. The three components are designated Zeta Sagittarii A (also named Ascella) and B, themselves forming a binary pair, and a smaller companion star, C. ""ζ Sagittarii"" (Latinised to ""Zeta Sagittarii"") is the system's Bayer designation. The designations of the two components"
"dominant stars, descending in clockwise order by magnitude: Beta, Gamma (one of the closest red giants to Earth), Delta and Epsilon Crucis. Many of these brighter stars are members of the Scorpius–Centaurus Association, a large but loose group of hot blue-white stars that appear to share common origins and motion across the southern Milky Way. The constellation contains four Cepheid variables that are each visible to the naked eye under optimum conditions. Crux also contains the bright and colourful open cluster known as the Jewel Box (NGC 4755) and, to the southwest, partly includes the extensive dark nebula, known as"
"luminosity . Beta Centauri Beta Centauri (β Centauri, abbreviated Beta Cen, β Cen), also named Hadar, is a triple star system in the southern constellation of Centaurus. The system's combined apparent visual magnitude of 0.61 makes it the second-brightest point of light in Centaurus and one of the brightest in the night sky. According to parallax measurements from the astrometric Hipparcos satellite, the distance to this system is about . Beta Centauri is well known in the Southern Hemisphere as the inner of the two ""Pointers"" to the asterism known as the Southern Cross. A line made from the other"
"Delta Cygni Delta Cygni (δ Cygni, abbreviated Delta Cyg, δ Cyg) is a binary star of a combined third-magnitude in the constellation of Cygnus. It is also part of the Northern Cross asterism whose brightest star is Deneb. Based upon parallax measurements obtained during the Hipparcos mission, Delta Cygni is located roughly distant from the Sun. Delta Cygni's two components are designated Delta Cygni A (also named Fawaris) and B. More widely separated is a faint third component, a 12th magnitude star that is moving along with the others. Together they form a triple star system. ""δ Cygni"" (Latinised to"
"the brightest globular cluster as visible from Earth and one of the largest known. Centaurus contains several very bright stars. Its alpha and beta stars are used as ""pointer stars"" to help observers find the constellation Crux. Centaurus has 281 stars above magnitude 6.5, meaning that they are visible to the unaided eye, the most of any constellation. Alpha Centauri, the closest star system to the Sun, has a high proper motion; it will be a mere half-degree from Beta Centauri in approximately 4000 years. Alpha Centauri is a triple star system that contains Proxima Centauri, the nearest star to"
"are defined by a 17-sided polygon. In the equatorial coordinate system, the right ascension coordinates of these borders lie between and , while the declination coordinates are between and . The International Astronomical Union (IAU) adopted the three-letter abbreviation ""Lyr"" for the constellation in 1922. The brightest and by far the most well-known star in the constellation is Vega, a main-sequence star of spectral type A0Va. Only 7.7 parsecs distant, is a Delta Scuti variable, varying between magnitudes −0.02 and 0.07 over 0.2 days. On average, it is the second-brightest star of the northern hemisphere (after Arcturus) and the fifth-brightest"