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The table of chords, created by the Greek astronomer, geometer, and geographer Ptolemy in Egypt during the 2nd century AD, is a trigonometric table in Book I, chapter 11 of Ptolemy's Almagest, [1] a treatise on mathematical astronomy. It is essentially equivalent to a table of values of the sine function.
The following is a list of astronomers, astrophysicists and other notable people who have made contributions to the field of astronomy.They may have won major prizes or awards, developed or invented widely used techniques or technologies within astronomy, or are directors of major observatories or heads of space-based telescope projects.
The order of the planets around the Sun and their periodicity. Chapters 12–14 give theorems for chord geometry as well as a table of chords. Book II describes the principles of spherical astronomy as a basis for the arguments developed in the following books and gives a comprehensive catalogue of the fixed stars. [5]
Star Gazers (formerly known as Jack Horkheimer: Star Hustler and later Jack Horkheimer: Star Gazer) is a short astronomy show on American public television previously hosted by Jack Horkheimer, executive director of the Miami Space Transit Planetarium.
Ek Mahal Ho Sapno Ka (transl. A Palace of Dreams) is a 1975 Indian Hindi-language drama film directed by Devendra Goel. It stars Ashok Kumar, Dharmendra, Sharmila Tagore, Leena Chandavarkar, Deven Verma. The music was composed by Ravi.
Mesh map of the inner Gould Belt created from Gaia observatory data. The Gould Belt is a local ring of stars in the Milky Way, tilted away from the galactic plane by about 16–20 degrees, first reported by John Herschel and Benjamin Gould in the 19th century. [1]
Caelum / ˈ s iː l əm / is a faint constellation in the southern sky, introduced in the 1750s by Nicolas Louis de Lacaille and counted among the 88 modern constellations.Its name means "chisel" in Latin, and it was formerly known as Caelum Sculptorium ("Engraver's Chisel"); it is a rare word, unrelated to the far more common Latin caelum, meaning "sky", "heaven", or "atmosphere". [3]