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Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life. According to radiometric dating and other evidence, Earth formed over 4.5 billion years ago. Earths gravity interacts with other objects in space, espec ...

Mars

Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury. In English, Mars carries a name of the Roman god of war and is often referred to as the Red Planet. The latter refers to the effect of the ir ...

Neptune

Neptune is the eighth and farthest known planet from the Sun in the Solar System. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet. Neptune is 17 times the mass of Earth ...

Pluto

Pluto is an icy dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It was the first Kuiper belt object to be discovered and is the largest known dwarf planet. Pluto was discovered by Clyde Tombaugh in 1930 as the ninth ...

Saturn

Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine times that of Earth. It only has one-eighth the average density of Earth; however, with its ...

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. This produces a visible atmosphere or coma, and sometimes also a tail. These phenomena are due to the ...

Exocomet

An exocomet, or extrasolar comet, is a comet outside the Solar System, which includes rogue comets and comets that orbit stars other than the Sun. The first exocomets were detected in 1987 around Beta Pictoris, a very young A-type main-sequence s ...

Lost comet

A lost comet is one which was not detected during its most recent perihelion passage. This generally happens when data is insufficient to reliably calculate the comets location or if the solar elongation is unfavorable near perihelion passage. Th ...

Main-belt comet

Active asteroids are small solar system bodies that have asteroid-like orbits but show comet-like visual characteristics. That is, they show comae, tails, or other visual evidence of mass-loss, but their orbit remains within Jupiters orbit. These ...

Antimatter comet

Antimatter comets are hypothetical comets composed solely of antimatter instead of ordinary matter. Although never actually observed, and unlikely to exist anywhere within the Milky Way, they have been hypothesized to exist, and their existence, ...

Comet Encke

Comet Encke or Enckes Comet is a periodic comet that completes an orbit of the Sun once every 3.3 years. Encke was first recorded by Pierre Mechain in 1786, but it was not recognized as a periodic comet until 1819 when its orbit was computed by J ...

Comet Humason

There is another long-period comet named Humason: C/1960 M1 a.k.a. 1959 X, 1960e. Comet Humason, formally designated C/1961 R1, was a non-periodic comet discovered by Milton L. Humason on September 1, 1961. Its perihelion was well beyond the orbi ...

24P/Schaumasse

By the end of 1912 it was recognised as a short period comet estimated to return in 7.1 years, later recalculated as 8 years. The 1919 return was recovered by Gaston Fayet Paris, France as magnitude 10.5. The 1927 approach was magnitude 12, but t ...

45P/Honda–Mrkos–Pajdusakova

45P/Honda–Mrkos–Pajdusakova is a short-period comet discovered by Minoru Honda December 3, 1948. It is named after Minoru Honda, Antonin Mrkos, and Ľudmila Pajdusakova. The object revolves around the Sun on an elliptical orbit with a period of 5. ...

36P/Whipple

36P/Whipple is a periodic comet in the Solar System. It is the lowest numbered Quasi-Hilda comet. The comet nucleus is estimated to be 4.5 kilometers in diameter.

51P/Harrington

51P/Harrington is a periodic comet in the Solar System. It was discovered by Robert George Harrington at Palomar Observatory on 14 August 1953 using the Schmidt telescope. It then had a brightness of magnitude 15. In October 1956 its orbit was af ...

52P/Harrington–Abell

52P/Harrington–Abell is a periodic comet in the Solar System. It was discovered by Robert G. Harrington and George O. Abell in 1955 on plates from the Palomar Sky Survey taken with the 49-inch Samuel Oschin telescope. It has been seen on every ap ...

37P/Forbes

37P/Forbes is a periodic comet in the Solar System. It was discovered on August 1, 1929 by Alex Rosebank ander F.I. Forbes of, South Africa. The comet nucleus is estimated to be 1.9 kilometers in diameter.

Sozin's Comet

Sozins Comet is the series finale of the American animated Nickelodeon television series Avatar: The Last Airbender. It was directed by Ethan Spaulding, Giancarlo Volpe, and Joaquim Dos Santos, and written by Michael Dante DiMartino, Bryan Koniet ...

Comet Swift–Tuttle

Comet Swift–Tuttle is a periodic comet with a current orbital period of 133 years. It fits the classical definition of a Halley-type comet with a period between 20 and 200 years. It was independently discovered by Lewis Swift on July 16, 1862 and ...

153P/Ikeya–Zhang

Comet Ikeya–Zhang is a comet discovered independently by two astronomers from Japan and China in 2002. On February 1, 2002, Chinese astronomer Zhang Daqing from Kaifeng discovered a new comet in the constellation Cetus, and reported it to the IAU ...

48P/Johnson

48P/Johnson is a periodic comet in the Solar System. The comet nucleus is estimated to be 5.7 kilometers in diameter by Lamy, Fernandez, and Weaver. David C. Jewitt and Scott S. Sheppard estimate the nucleus to have dimensions of 6.0 x 4.4 km.

35P/Herschel–Rigollet

35P/Herschel–Rigollet is a periodic comet with an orbital period of 155 years. It fits the classical definition of a Halley-type comet with. It was discovered by Caroline Herschel on 1788-12-21. Given that the comet takes 155 years to orbit the S ...

33P/Daniel

Comet Daniel is a periodic comet in the solar system discovered by Zaccheus Daniel on December 7, 1909, estimated as magnitude 9. Following its discovery, the returns for 1916, 1923, and 1930 were predicted but on each occasion it was not recover ...

Halley's Comet

Halleys Comet or Comet Halley, officially designated 1P/Halley, is a short-period comet visible from Earth every 75–76 years. Halley is the only known short-period comet that is regularly visible to the naked eye from Earth, and the only naked-ey ...

34D/Gale

Comet Gale is a periodic comet in the Solar System discovered by Walter Frederick Gale on June 7, 1927. The second apparition was calculated for 1938, but Gale failed to find it; however, it was recalculated by Leland E. Cunningham who later reco ...

43P/Wolf–Harrington

43P/Wolf–Harrington is a periodic comet discovered on December 22, 1924, by Max Wolf in Heidelberg, Germany. In 2019 it will pass within 0.065 AU of Jupiter, which will lift the perihelion point and increase the orbital period to 9 years. During ...

Comet West

Comet West, formally designated C/1975 V1, 1976 VI, and 1975n, was a comet described as one of the brightest objects to pass through the inner Solar System in 1976. It is often described as a "great comet."

40P/Vaisala

40P/Vaisala is a periodic comet that was discovered on February 8, 1939. Its orbit was determined on April 26, 1939. In 1994, the diameter of its nucleus was found to be 4.2 km, similar in size to that of Comet Encke.

49P/Arend–Rigaux

49P/Arend–Rigaux is a periodic comet in the Solar System. The comet nucleus is estimated to be 8.48 kilometers in diameter with a low albedo of 0.028. On 20 December 2058 the comet will pass 0.0867 AU 12.970.000 km; 8.060.000 mi from Mars.

47P/Ashbrook–Jackson

August 19, 1978 January 24, 1986 January 6, 2001 October 28, 2025 April 6, 1956 October 4, 1948 June 10, 2017 October 2, 1963 July 14, 1993 January 31, 2009 March 13, 1971

27P/Crommelin

Comet Crommelin, also known as Comet Pons-Coggia-Winnecke-Forbes, is a periodic comet with an orbital period of almost 28 years. It fits the classical definition of a Halley-type comet with. It is named after the British astronomer Andrew C. D. C ...

Comet Lovejoy

Comet Lovejoy may refer to: C/2011 W3 Lovejoy, a comet discovered in 2011, noted for its pass through the Suns corona C/2017 E4 Lovejoy, a comet discovered in 2017 by Terry Lovejoy C/2007 E2 Lovejoy, a comet discovered in March 2007 C/2014 Q2 Lov ...

44P/Reinmuth

44P/Reinmuth or Reinmuth 2 is a Jupiter-family comet that is greatly perturbed by the gas giant Jupiter. The diameter of this comet is estimated at 3.22 km and its absolute magnitude at 11.

38P/Stephan–Oterma

38P/Stephan–Oterma is a periodic comet with an orbital period of 38 years. It fits the classical definition of a Halley-type comet with. It was discovered in January 1867, by Jerome Eugene Coggia at Marseilles Observatory, France. 38P/Stephan–Ote ...

50P/Arend

Comet Arend or 50P/Arend is a periodic comet in the Solar System which was discovered on October 4, 1951. It was discovered by astronomer Sylvain Julien Victor Arend at the Royal Observatory of Belgium located in the municipality of Uccle. The co ...

Great Comet of 1811

The Great Comet of 1811, formally designated C/1811 F1, is a comet that was visible to the naked eye for around 260 days, a record it held until the appearance of Comet Hale–Bopp in 1997. In October 1811, at its brightest, and when it was 1.2 AU ...

Great Comet of 1843

The Great Comet of 1843, formally designated C/1843 D1 and 1843 I, was a long-period comet which became very bright in March 1843. It was discovered on February 5, 1843 and rapidly brightened to become a great comet. It was a member of the Kreutz ...

Great Comet of 1882

The Great Comet of 1882 formally designated C/1882 R1, 1882 II, and 1882b, was a comet which became very bright in September 1882. It was a member of the Kreutz Sungrazers, a family of comets which pass within 1 R ☉ of the Suns photosphere at per ...

Great Southern Comet of 1887

The Great Southern Comet of 1887, or C/1887 B1 using its International Astronomical Union designation, was a bright comet seen from the Southern Hemisphere during January 1887. Later calculations indicated it to be part of the Kreutz Sungrazing g ...

Great January Comet of 1910

The Great January Comet of 1910, formally designated C/1910 A1 and often referred to as the Daylight Comet, was a comet which appeared in January 1910. It was already visible to the naked eye when it was first noticed, and many people independent ...

Great comet

A great comet is a comet that becomes exceptionally bright. There is no official definition; often the term is attached to comets such as Halleys Comet, which are bright enough to be noticed by casual observers who are not looking for them, and b ...

Extinct comet

An extinct comet is a comet that has expelled most of its volatile ice and has little left to form a tail and coma. In a dormant comet, rather than being depleted, any remaining volatile components have been sealed beneath an inactive surface lay ...

Great Comet of 1823

The Great Comet of 1823, also designated C/1823 Y1 or Comet De Breaute-Pons, was a bright comet visible in the last month of 1823 and the first months of 1824. It was independently discovered by Nell de Breaute at Dieppe on December 29, by Jean-L ...

Holiday

A holiday is a day set aside by custom or by law on which normal activities, especially business or work including school, are suspended or reduced. Generally, holidays are intended to allow individuals to celebrate or commemorate an event or tra ...

Public holidays in Russia

The following is the list of official public holidays recognized by the Government of Russia. On these days, government offices, embassies and some shops, are closed. If the date of observance falls on a weekend, the following Monday will be a da ...

Feasts of Jesus Christ

Feasts of Jesus Christ are specific days of the year distinguished in the liturgical calendar as being significant days for the celebration of events in the life of Jesus Christ and his veneration, for the commemoration of his relics, signs and m ...

Scarlet Sails (tradition)

The Scarlet Sails is a celebration in St. Petersburg, Russia, the most massive and famous public event during the White Nights Festival every summer. The tradition is highly popular for its spectacular fireworks, numerous music concerts and a mas ...

National day

A national day is a designated date on which celebrations mark the nationhood of a nation or non-sovereign country. This nationhood can be symbolized by the date of independence, of becoming a republic or a significant date for a patron saint or ...

International Workers' Day

International Workers Day, also known as Workers Day, Labour Day in some countries and often referred to as May Day, is a celebration of labourers and the working classes that is promoted by the international labour movement which occurs every ye ...

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