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Longman Dictionary of Contemporary English
▪ Clearly comet nuclei are very weak.
▪ As long as a comet nucleus is still active, fresh clouds of dust are emitted at each perihelion passage.
▪ The other half of the NEOs are extinct comet nuclei.
▪ Female speaker Well I've seen Halley's comet and it doesn't to me.
▪ Steve Kates has seen a dozen comets since he was a 9-year-old.
▪ The darker the sky, the better chance of seeing the comet, he said.
▪ Astronomers had accidentally caught a comet in the act of turning into an asteroid.
▪ At best, the comet will be visible to us naked-eye types for only a few more weeks.
▪ Other comets have also been seen to break up.
▪ Rourke was the one who was shooting out of her sphere like a trail-blazing comet.
▪ Sciorra plays a Colorado astronomer who discovers that an approaching comet has dislodged several asteroids, propelling them toward Earth.
▪ Surprisingly, they were the first comets found from Britain this century.
▪ To extend the parallel, the impact of the comet would also have released large quantities of hard radiation.
▪ Viewed from space, the normal progress of the survey ship was like the passage of a comet.
The Collaborative International Dictionary

Comet \Com"et\, n. [L. cometes, cometa, from Gr. ? comet, prop. long-haired, fr. ? to wear long hair, fr. ? hair, akin to L. coma: cf. F. com[`e]te.] (Astron.) A member of the solar system which usually moves in an elongated orbit, approaching very near to the sun in its perihelion, and receding to a very great distance from it at its aphelion. A comet commonly consists of three parts: the nucleus, the envelope, or coma, and the tail; but one or more of these parts is frequently wanting. See Illustration in Appendix. [1913 Webster] ||

Douglas Harper's Etymology Dictionary

c.1200, from Old French comete (12c., Modern French comète), from Latin cometa, from Greek (aster) kometes, literally "long-haired (star)," from kome "hair of the head" (compare koman "let the hair grow long"), which is of unknown origin. So called from resemblance of a comet's tail to streaming hair.


n. 1 (context astronomy English) A celestial body consisting mainly of ice, dust and gas in a (usually very eccentric) orbit around the Sun and having a "tail" of matter blown back from it by the solar wind as it approaches the Sun. 2 A celestial phenomenon with the appearance given by the orbiting celestial body. 3 Any of several species of hummingbird found in the Andes.


n. (astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit

Comet (tank)

The Comet tank, or Tank, Cruiser, Comet I (A34) was a British cruiser tank that first saw use near the end of the Second World War. It was designed as in improvement on the earlier Cromwell tank, mounting the 77mm HV gun in a new lower profile and part-cast turret. This gun was effective against late war German tanks, including the Panther and, at most ranges, the Tiger. The tank was widely respected as one of the best British tanks of the war, and continued in service afterwards.

Comet, which was a development of the Cromwell, rendered the Challenger obsolete, and led to the development of the Centurion tank. When firing APDS rounds, the 77mm HV was a superior weapon to the 75mm KwK 42 gun of the equivalent Axis tank, the Panther.

The Comet saw action in the closing stages of the Second World War, saw post-war combat during the Korean War, and remained in British service until 1958. In some cases, Comets sold to other countries continued to operate into the 1980s.

Comet (disambiguation)

A comet is a small astronomical body which orbits the sun.

Comet may also refer to:

Comet (Lincoln Park)

The Comet was a twister-layout wooden roller coaster that operated in the now defunct Lincoln Park in Massachusetts. It operated from 1946 until 1987.

Comet (railcar)

The Comet railcar is a class of locomotive-hauled railcars that was first designed in the late 1960s by Pullman-Standard as a modern commuter car for North American rail lines. Later, the Comet moniker was adopted by New Jersey Transit for all of its non-powered single level commuter coaches. Additional series of cars bearing the Comet name, based on the original design, have since been built by Bombardier Transportation and Alstom. The successful design was adopted by numerous commuter agencies.

Comet (Hersheypark)

The Comet is a wooden roller coaster at Hersheypark in Hershey, Pennsylvania. It is located in the Hollow section of Hersheypark, next to Skyrush. Built in 1946 by the Philadelphia Toboggan Coasters (PTC) of Philadelphia, Pennsylvania, the coaster features a double out and back track layout. When built it was jointly owned by Hershey Park and PTC.

Comet (comics)

Comet, in comics, may refer to:

  • Comet (Archie Comics), an Archie Comics character
  • Comet (DC Comics), a number of DC Comics characters
  • Comet (Impact Comics), an Impact Comics character
  • Comet (Marvel Comics), a Marvel Comics character
  • The Comet (comic magazine), a British publication
Comet (book)

Comet is a 1985 popular-science book by Carl Sagan and Ann Druyan. The authors describe the scientific nature of comets, as well as their varying roles and perceptions throughout history. The evolution of human understanding of comets is also detailed, and thinkers and astronomers such as Edmond Halley, Immanuel Kant, and William Huggins are discussed.

The publication of the book was months ahead of the 1986 appearance of Halley's Comet.

Comet (pyrotechnics)

In pyrotechnics a comet is a block attached to the outside of a shell or launched freely, which burns and emits sparks as the shell is rising, leaving a trail in the sky. Some comets use a matrix composition with small stars embedded in it. The matrix composition burns with little light but ignites the stars, producing the effect. Some freely-launched comets contain crossette breaks, which explode and break the comet into pieces to produce a branching effect.

Comets intended for use indoors near an audience, such as at a rock concert, are typically freely-launched projectiles designed to completely consume themselves to reduce the hazard to audience members.

Hardy using the comet pyrotechnics in his ring entrance

Comet (train)

The Comet was a diesel-electric streamliner built in 1935 for the New York, New Haven and Hartford Railroad by the Goodyear-Zeppelin Company. Smaller than the other streamliners, it was a three-car, double-ended train that could operate in both directions and thus did not need to be turned at destinations—ideal for the New Haven's cramped terminus at South Station in Boston.

It was initially placed into service between Boston, Massachusetts and Providence, Rhode Island on a 44-minute schedule; later, intermediate stops were added at Back Bay, Boston and Pawtucket/Central Falls, RI on an advertised "44 miles in 44 minutes" schedule. It ran 5 daily round trips on weekdays, and was often used for weekend excursion trips. This service lasted until the beginning of World War II, when increased traffic volume overwhelmed the capacity of the Comet, after which it was placed on local commuter services around the Boston area. The trainset was withdrawn from service in 1951 and scrapped.

The interior was furnished with 48 seat in each power car, and 64 in the center car divided into two sections: a smoking section seating 28 and a non-smoking seating 36. Seating was of the 'walk-over' type, and all seats were coach-class; there being no provision for first- or parlor-class seating.

The exterior was machined aluminum in a whorled pattern with color bands of bright blue enamel at window height, dark blue enamel at wheel level, and a gray enamel roof. The whole exterior was covered with a coat of clear varnish to prevent tarnishing. The front ends were sharply raked, with a pointed "chin" pilot.

Comet (dinghy)

The Comet dinghy is a , two-person, one-design class, racing sloop.

With . of sail and a minimal keel-rocker hull, the Comet is able to plane in modest 10-15 knot winds. The mast is tall and is supported by a conventional three-stay rig with spreaders. (As the class rules are flexible in this regard, some Comets have been configured with 8-stay, Star (sailboat) rigs.) From 1932 through the 1960s, the Comet minimum hull weight was specified as . Since then, the minimum weight has been lowered to . with the incorporation of an aluminum centerboard, which replaced the former bronze board. Also, since the 1960s, the Comet has been built in fiberglass along with its original wood construction.

The Comet Class Association is the organizing body responsible for maintaining the one-design specifications and sanctioning of regattas.

The Comet originated in 1932 when Mr. C. Lowndes Johnson was commissioned by Mrs. Elliot Wheeler to design a boat for her sons. Johnson was a former Star class keel boat champion, and he designed the Comet to have many of the same features and characteristics of the Star. However, unlike the Star, Johnson created a racing yacht that was much less costly to build and could be easily sailed in the shallow tidal waters of the Chesapeake Bay. Like the Star, the Comet was a hard chine sloop with a relatively large main sail compared to its jib.

Originally called the "Crab," the design was first introduced to the public in the March issue of "Yachting Magazine" in 1932. The following year it made an appearance at the New York Boat Show as the "Star Junior." Soon thereafter, John ("Doc") Eiman, Erik Jansson, and Wilbur H. Haines, Jr. started the first Comet fleet at the Yacht Club of Stone Harbor in Stone Harbor, NJ. It was at this time that the moniker "Star Junior" was dropped and replaced with the name "Comet."

Despite being a One Design, the Comet has seen many variations of the past 70 years, in regards to construction, hull shape, and cockpit layout.

"Do not confuse the Johnson-designed Comet with the single-handed dinghy of the same name often seen in UK waters." Class association for single handed comet is


Classic Boat - Comet Class Notes

Brodsky, John; "The Development of the Boat and the Class"

Comet (racing dinghy)

The Comet is a single handed, one design racing dinghy available with three separate rigging options: Standard, Xtra and Mino, that can be raced competitively alongside each other. It is mainly sailed in the United Kingdom at club level and at open meetings organised by the Comet Class Association. The Comet is a recognised RYA dinghy class.

Comet (fish)

The comet or marine betta (Calloplesiops altivelis) is a species of reef-associated tropical marine fish in the longfin family Plesiopidae, most commonly found between 3 and 50 m deep. It is native to the Indo-Pacific Ocean. It can reach a maximum length of 20 cm.

Comet (Waldameer)

Comet is a wooden roller coaster that is located at Waldameer Park in Erie, Pennsylvania, United States. It was designed by Herbert Schmeck and built by the Philadelphia Toboggan Company in 1951. It is similar to other Schmeck-designed PTC junior wooden coasters which feature a layered, figure-8/oval layout. However, Comet is taller than the previous junior wooden coaster designs. Comet is an ACE Coaster Classic.

Comet (The Bouncing Souls album)

Comet is the ninth album from The Bouncing Souls. It was released on June 12, 2012 by Rise Records in conjunction with Chunksaah Records, the band's own label. It was produced by Bill Stevenson and recorded at The Blasting Room. It debuted at number 110 on the Billboard 200 chart.

Comet (pinball)

Comet is a pinball machine released by Williams in June 1985. It was designed by Barry Oursler and was the first in a Rollercoaster/Carnival themed pinball trilogy followed by Cyclone in 1988 and Hurricane in 1991.

Comet (DC Comics)

Comet is the name of two fictional comic book characters owned by DC Comics whose adventures have been published by that same company. The first character was a sapient horse with magical powers who was once a centaur in ancient Greece. The second character is a shapeshifter with three forms (male, female, and winged centaur). Both characters are connected to the Superman family of titles.

Due to the events depicted in the 1985 limited series Crisis on Infinite Earths, the first character's stories are no longer considered to be canon within DC's main shared universe, known as the DC Universe.

Comet (Archie Comics)

The Comet is a fictional character that first appeared in Pep Comics #1 in January, 1940. Possibly the first superhero killed in the line of duty, he died in issue #17 (July, 1941), which also introduced his brother, a brutal hero called the Hangman who would use the projected image of a scaffold and descriptions of hanging to frighten crooks. A number of his foes ended up hanged by pieces of rope which had coiled around their necks while they were falling.

The character preceding the Cyclops of Marvel Comics, which has the visor and similar powers.

Comet (programming)

Comet is a web application model in which a long-held HTTP request allows a web server to push data to a browser, without the browser explicitly requesting it. Comet is an umbrella term, encompassing multiple techniques for achieving this interaction. All these methods rely on features included by default in browsers, such as JavaScript, rather than on non-default plugins. The Comet approach differs from the original model of the web, in which a browser requests a complete web page at a time.

The use of Comet techniques in web development predates the use of the word Comet as a neologism for the collective techniques. Comet is known by several other names, including Ajax Push, Reverse Ajax, Two-way-web, HTTP Streaming, and HTTP server push among others. The term Comet is not an acronym, but was coined by Alex Russell in his 2006 blog post Comet: Low Latency Data for the Browser.

Comet (cleanser)

Comet is a powdered cleaning product and brand of related cleansing products. The brand was introduced in 1956 by Procter & Gamble, and was sold to Prestige Brands in 2001. Comet is now sold in North America and distributed in the United States by Prestige Brands. Procter & Gamble retained the rights to market the brand in Europe, and to the professional (non-home consumer) market in the USA.

According to the Material Safety Datasheets published by Procter and Gamble (P&G) (PGP Comet Deoderizing Cleanser with Chlorinol ) and Prestige Brands (Comet Powdered Cleanser), Comet contains 60-100% calcium carbonate. Other ingredients common to all Prestige Brands Comet Powdered Cleansers are listed as:

  • Calcium Carbonate - Scrubbing Agent
  • Calcium Hydroxide - pH Adjuster
  • Fragrance
  • Green 7 - Colorant (except in Comet Lemon Powder)
  • Sodium Carbonate - Builder/Sequestering Agent
  • Sodium Linear Alkylbenzenesulfonate Surfactant - Cleaning Agent
  • Trichloro-s-triazinetrione - Bleach

The P&G Professional Comet MSDS details percentages :

  • Calcium Carbonate 60-100%
  • Sodium Carbonate 7-13%
  • Calcium Hydroxide 1-5%
  • Sodium Dicholor-s Triazinetrione Dihydrate 1-5%

Not all ingredients are listed on an MSDS.

Mixing cleaners containing bleach or other oxygenates such as Comet with cleaners or other products that contain ammonia or acid is dangerous. The P&G Comet MSDS states "Avoid contact with acids. and Ammonia."

Despite being labeled as scratch free, its label also advises the use of plenty of water on delicate surfaces. Comet is not recommended for use on silver, painted surfaces, walls, soft plastic, aluminum and rubber.

Comet (film)

Comet is a 2014 American comedy drama film directed and written by Sam Esmail. The film stars Emmy Rossum and Justin Long. The movie had its world premiere at Los Angeles Film Festival on June 13, 2014. The film was released on December 5, 2014 by IFC Films.

Comet (TV network)

Comet is an American digital broadcast television network that is owned by the Sinclair Television Group, a subsidiary of the Sinclair Broadcast Group with operational partner, MGM Television, a division of Metro-Goldwyn-Mayer. The network focuses on science fiction with some supernatural, horror, adventure and fantasy series and films, sourced mainly from the Metro-Goldwyn-Mayer library.

Comet (song)

"Comet" was a well-known humorous children's song in North America. It describes the deleterious effects of consuming Comet cleanser—a powdered cleansing product. The most prominent and often-occurring effect in the song is that it turns one's teeth green. Among other effects alleged by this song are an unappealing taste and, unsurprisingly, a tendency to vomit.

Although this song, like many in its genre, has widely variable lyrics, a common version contains the following words:

Comet - it makes your teeth turn green!; Comet - it tastes like gasoline!; Comet - it makes you vomit; So buy [or "eat"] some Comet, and vomit, today!

The melody of the song is the " Colonel Bogey March".

Comet (programming language)

Comet is a commercial programming language designed by Brown University professor Dr. Pascal Van Hentenryck used to solve complex combinatorial optimization problems in areas such as resource allocation and scheduling. It offers a range of optimization algorithms: from mathematical programming to constraint programming, local search algorithm and "dynamic stochastic combinatorial optimization."

Comet programs specify local search algorithms as two components:

  • a high-level model describing the applications in terms of constraints, constraint combinators, and objective functions;
  • a search procedure expressed in terms of the model at a high abstraction level.

This approach promotes reusability across applications.

Its API allows it to be used as a software library. Comet also features high-level abstractions for parallel and distributed computing, based on loop scheduling, interruptions, and work stealing.

Comet (band)

Comet is an American indie rock band that was formed in 1993 in the Dallas, Texas suburb of Mesquite. Described as an enigmatic noise pop outfit brought together by a common love of the Beatles, the original lineup of singer/guitarist Jim Stone, his bassist-brother Neil Stone, guitarist Daniel Huffman, and percussionist Josh Garza entered the studio later that year to cut their debut single "Portrait," produced by Mercury Rev alum David Baker. A deal with the Arista subsidiary Dedicated label followed, they became label mates with Spiritualized, Beth Orton and the Cranes and with Baker again at the helm, Comet recorded their LP bow Chandelier Musings, issued in late 1996. The band toured throughout much of 1995 and 1996 and into early 1997 when fallout from a tour-van accident led to the eventual break up of the original line-up.

Comet (magazine)

Comet was a pulp magazine which published five issues from December 1940 to July 1941. It was edited by F. Orlin Tremaine, who had edited Astounding Stories, one of the leaders of the science fiction magazine field, for several years in the mid-1930s. Tremaine paid one cent per word, which was higher than some of the competing magazines, but the publisher, H-K Publications, was unable to sustain the magazine while it gained circulation, and it was cancelled after less than a year when Tremaine resigned. Comet published fiction by several well-known and popular writers, including E.E. Smith and Robert Moore Williams. The young Isaac Asimov, visiting Tremaine in Comets offices, was alarmed when Tremaine asserted that anyone who gave stories to competing magazines for no pay should be blacklisted; Asimov promptly insisted that Donald Wollheim, to whom he had given a free story, should make him a token payment so he could say he had been paid.

Usage examples of "comet".

And, we might also ask, why the tangential resistance to the comet of Encke should not also produce a retrograde motion in the apsides of the orbit, instead of diminishing its period?

She was an astrogeologist who had done her doctoral thesis on comet formation.

Then I came down to the Atheneum and looked over my comet computations till noon.

The probe had detected a unique bioelectric signature emanating from inside the comet, one that Starfleet scientists found comparable to that of a tiny percentage of Trills.

If this condition is not complied with, and only one person discovers the comet, no medal will be given for the discovery.

Only last year, Dakotan researchers found conclusive evidence that a comet came through our solar system and disrupted the orbits of all the inner planets, yours included.

They were instructed to occupy the core of a comet and from it keep an eye on those endoskeletal, but potentially annoying, creatures who had discovered agriculture, fire, the city, and the wheel, but not as yet even chemical explosive weapons.

Briefly, after the comet impact, the top predators around the water courses had been crocodile cousins with long legs and hooflike claws.

Lydis was flying a heavy-duty space tuga comet chaserinstead of one of the lightweight interbranch shuttles.

The wagon was garish even compared to the others in the show, a red-and-blue thing that shone like the finest lacquerwork, every surface spotted with golden comets and stars.

Close to them are some of our younger adepts: Lanius Suncatcher, the new Chief Sorcerer at Palace Security, along with Capali Comet Rider and Orius Fire Tamer.

It was now driving at full Lawlor-drive speed toward Manaos, but it could not use overdrive in the areas where a planet had broken up into asteroids or where the elongated orbits of comets might interfere.

When she cupped her hands around her faceplate she could see the tail of yet another giant comet, smeared milkily over the black dome of the sky.

Earth continued to be pelted relentlessly by comets, meteorites, and other galactic debris, which brought water to fill the oceans and the components necessary for the successful formation of life.

He is responsible for the orbits of about half the periodic comets in the Solar System.