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41 relations: Anders Johan Lexell, Apparent magnitude, Astronomer, Astronomical unit, Chaos theory, Charles Messier, Coma (cometary), Comet, Comet Encke, Comet nucleus, Earth, Elliptic orbit, Halley's Comet, Harvard University Press, Hejaz, Hijri year, Japan, John Whitney Hall, Julian day, Jupiter, Lost comet, Lunar distance (astronomy), Minute and second of arc, NASA, Near-Earth object, Nebula, Orbit determination, Parabolic trajectory, Perihelion and aphelion, Perturbation (astronomy), Pierre-Simon Laplace, Radius, Recorded history, Sagittarius (constellation), Solar System, Sun, Sungrazing comet, Tanuma Okitsugu, Urbain Le Verrier, Yale University Press, 27P/Crommelin.
Anders Johan Lexell
Anders Johan Lexell (24 December 1740 &ndash) was a Finnish-Swedish astronomer, mathematician, and physicist who spent most of his life in Imperial Russia, where he was known as Andrei Ivanovich Leksel (Андрей Иванович Лексель).
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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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Astronomer
An astronomer is a scientist in the field of astronomy who concentrates their studies on a specific question or field outside the scope of Earth.
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Astronomical unit
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
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Chaos theory
Chaos theory is a branch of mathematics focusing on the behavior of dynamical systems that are highly sensitive to initial conditions.
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Charles Messier
Charles Messier (26 June 1730 – 12 April 1817) was a French astronomer most notable for publishing an astronomical catalogue consisting of nebulae and star clusters that came to be known as the 110 "Messier objects".
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Coma (cometary)
The coma is the nebulous envelope around the nucleus of a comet, formed when the comet passes close to the Sun on its highly elliptical orbit; as the comet warms, parts of it sublime.
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Comet
A comet is an icy small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process called outgassing.
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Comet Encke
Comet Encke or Encke's Comet (official designation: 2P/Encke) is a periodic comet that completes an orbit of the Sun once every 3.3 years.
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Comet nucleus
The nucleus is the solid, central part of a comet, popularly termed a dirty snowball or an icy dirtball.
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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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Elliptic orbit
In astrodynamics or celestial mechanics, an elliptic orbit or elliptical orbit is a Kepler orbit with an eccentricity of less than 1; this includes the special case of a circular orbit, with eccentricity equal to 0.
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Halley's Comet
Halley's Comet or Comet Halley, officially designated 1P/Halley, is a short-period comet visible from Earth every 74–79 years.
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Harvard University Press
Harvard University Press (HUP) is a publishing house established on January 13, 1913, as a division of Harvard University, and focused on academic publishing.
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Hejaz
The Hejaz (اَلْـحِـجَـاز,, literally "the Barrier"), is a region in the west of present-day Saudi Arabia.
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Hijri year
The Hijri year (سَنة هِجْريّة) or era (التقويم الهجري at-taqwīm al-hijrī) is the era used in the Islamic lunar calendar, which begins its count from the Islamic New Year in 622 AD.
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Japan
Japan (日本; Nippon or Nihon; formally 日本国 or Nihon-koku, lit. "State of Japan") is a sovereign island country in East Asia.
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John Whitney Hall
John Whitney Hall (September 13, 1916 – October 21, 1997),"John Whitney Hall papers, 1930-1999", Yale University Library the Tokyo-born son of missionaries in Japan, grew up to become a pioneer in the field of Japanese studies and one of the most respected historians of Japan of his generation.
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Julian day
Julian day is the continuous count of days since the beginning of the Julian Period and is used primarily by astronomers.
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Jupiter
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
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Lost comet
A lost comet is a previously discovered comet that has been missed at its most recent perihelion passage, generally because there is not enough data to calculate reliably the comet's orbit and predict its location.
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Lunar distance (astronomy)
Lunar distance (LD or \Delta_), also called Earth–Moon distance, Earth–Moon characteristic distance, or distance to the Moon, is a unit of measure in astronomy.
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Minute and second of arc
A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.
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NASA
The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.
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Near-Earth object
A near-Earth object (NEO) is any small Solar System body whose orbit can bring it into proximity with Earth.
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Nebula
A nebula (Latin for "cloud" or "fog"; pl. nebulae, nebulæ, or nebulas) is an interstellar cloud of dust, hydrogen, helium and other ionized gases.
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Orbit determination
Orbit determination is the use of a set of techniques for estimating the orbits of objects such as moons, planets, and spacecraft.
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Parabolic trajectory
In astrodynamics or celestial mechanics a parabolic trajectory is a Kepler orbit with the eccentricity equal to 1.
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Perihelion and aphelion
The perihelion of any orbit of a celestial body about the Sun is the point where the body comes nearest to the Sun.
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Perturbation (astronomy)
In astronomy, perturbation is the complex motion of a massive body subject to forces other than the gravitational attraction of a single other massive body.
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Pierre-Simon Laplace
Pierre-Simon, marquis de Laplace (23 March 1749 – 5 March 1827) was a French scholar whose work was important to the development of mathematics, statistics, physics and astronomy.
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Radius
In classical geometry, a radius of a circle or sphere is any of the line segments from its center to its perimeter, and in more modern usage, it is also their length.
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Recorded history
Recorded history or written history is a historical narrative based on a written record or other documented communication.
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Sagittarius (constellation)
Sagittarius is one of the constellations of the zodiac.
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Solar System
The Solar SystemCapitalization of the name varies.
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Sun
The Sun is the star at the center of the Solar System.
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Sungrazing comet
A sungrazing comet is a comet that passes extremely close to the Sun at perihelion – sometimes within a few thousand kilometres of the Sun's surface.
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Tanuma Okitsugu
(September 11, 1719, in Edo, Japan – August 25, 1788, in Edo) was a chamberlain (sobashū) and a senior counselor (rōjū) to the shōgun Tokugawa Ieharu.
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Urbain Le Verrier
Urbain Jean Joseph Le Verrier (11 March 1811 – 23 September 1877) was a French mathematician who specialized in celestial mechanics and is best known for predicting the existence and position of Neptune using only mathematics.
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Yale University Press
Yale University Press is a university press associated with Yale University.
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27P/Crommelin
Comet Crommelin, also known as Comet Pons-Coggia-Winnecke-Forbes, is a periodic comet with an orbital period of almost 28 years.
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Redirects here:
Comet Lexell, D/1770 L1, Lexell's comet.
References
[1] https://en.wikipedia.org/wiki/Lexell's_Comet
