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16 relations: Abd al-Rahman al-Sufi, Apparent magnitude, C, Caldwell catalogue, Constellation, Earth, IC 2602, Light-year, Lithium depletion boundary, Naked eye, New General Catalogue, Nicolas-Louis de Lacaille, Omicron Velorum, Open cluster, Parsec, Vela (constellation).
Abd al-Rahman al-Sufi
'Abd al-Rahman al-Sufi (عبدالرحمن صوفی (December 7, 903 in Rey, Iran – May 25, 986 in Shiraz, Iran) was a Persian astronomer also known as 'Abd ar-Rahman as-Sufi, 'Abd al-Rahman Abu al-Husayn, 'Abdul Rahman Sufi, or 'Abdurrahman Sufi and, historically, in the West as Azophi and Azophi Arabus. The lunar crater Azophi and the minor planet 12621 Alsufi are named after him. Al-Sufi published his famous Book of Fixed Stars in 964, describing much of his work, both in textual descriptions and pictures. Al-Biruni reports that his work on the ecliptic was carried out in Shiraz. He lived at the Buyid court in Isfahan.
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Apparent magnitude
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
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C
C is the third letter in the English alphabet and a letter of the alphabets of many other writing systems which inherited it from the Latin alphabet.
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Caldwell catalogue
The Caldwell Catalogue is an astronomical catalogue of 109 star clusters, nebulae, and galaxies for observation by amateur astronomers.
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Constellation
A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.
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Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
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IC 2602
IC 2602, generally known as the Southern Pleiades or Theta Carinae Cluster, is an open cluster in the constellation Carina that was discovered by Abbe Lacaille in 1751 from South Africa.
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Light-year
The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.
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Lithium depletion boundary
The lithium depletion boundary (LDB) technique is a method proposed for dating open clusters based on a determination of the lithium abundances of a cluster's stars whose masses are at about the hydrogen burning mass limit.
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Naked eye
Naked eye, also called bare eye or unaided eye, is the practice of engaging in visual perception unaided by a magnifying or light-collecting optical instrument, such as a telescope or microscope.
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New General Catalogue
The New General Catalogue of Nebulae and Clusters of Stars (abbreviated as NGC) is a catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888.
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Nicolas-Louis de Lacaille
Abbé Nicolas-Louis de Lacaille, formerly sometimes spelled de la Caille, (15 March 1713 – 21 March 1762) was a French astronomer.
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Omicron Velorum
Omicron Velorum (ο Vel, ο Velorum) is a star in the constellation Vela.
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Open cluster
An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age.
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Parsec
The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System.
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Vela (constellation)
Vela is a constellation in the southern sky.
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Caldwell 85, IC2391, Lac II 5, Lacaille II 5, Omicron Vel Cluster, Omicron Velorum Cluster, Ο Velorum Cluster.
