Great comet

brilliant cometclose approach to the earthcometary outburstdaylight-visible cometList of Great Comets
A great comet is a comet that becomes exceptionally bright.wikipedia
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Comet

cometslong-period cometJupiter-family comet
A great comet is a comet that becomes exceptionally bright.
Particularly bright examples are called "great comets".

Comet Hale–Bopp

Comet Hale-BoppHale-BoppHale–Bopp
For example, Comet Hale–Bopp had an exceptionally large and active nucleus, but did not approach the Sun very closely at all, yet it still became an extremely famous and well observed comet.
Accordingly, Hale–Bopp was dubbed the Great Comet of 1997.

Caesar's Comet

appearance of a cometComet StarJulian star
Its seven-day cometary outburst was interpreted by Romans as a sign of the deification of recently assassinated dictator, Julius Caesar (100–44 BC).

Comet Hyakutake

HyakutakeC/1996 B2 (Hyakutake)Comet C/1996 B2, also known as Comet Hyakutake
Equally, Comet Hyakutake was a relatively small comet, but appeared bright because it passed extremely close to the Earth.
Comet Hale–Bopp was already being discussed as a possible "great comet"; the astronomical community eventually realised that Hyakutake might also become spectacular because of its close approach.

X/1106 C1

Great Comet of 1106a large comet which broke up in 1106
X/1106 C1, also known as the Great Comet of 1106, was a great comet that appeared on 2 February 1106, and was observed across the world from the beginning of February through to mid-March.

Great Comet of 1819

Comet TrallesC/1819 N1
The Great Comet of 1819, officially designated as C/1819 N1, also known as Comet Tralles, was an easily visible brilliant comet, approaching an apparent magnitude of 1–2, discovered July 1, 1819 by Johann Georg Tralles in Berlin, Germany.

Great Comet of 1744

C/1743 X1great six-tailed comet in 1744
Its apparent magnitude may have reached as high as -7, leading it to be classified among what are called the "Great Comets".

Great Comet of 1843

large comet1843C/1843 D1
It was discovered on February 5, 1843 and rapidly brightened to become a great comet.

C/1861 J1

Great Comet of 1861The Great Comet of 1861
It was categorized as a great comet—one of the eight greatest comets of the 19th century.

Comet West

C/1975 V1 (West)C/1975 V1
It is often described as a "great comet."

Comet Skjellerup–Maristany

C/1927 X1C/1927 X1 (Skjellerup–Maristany)Comet Skjellerup-Maristany
This great comet was observable to the naked eye for about 32 days.

Great Comet of 1882

C/1882 R11882comet
Studies of the orbit of the comet showed that the Great Comet of 1882 was moving on an almost identical path to previous great comets seen in C/1843 D1 and C/1880 C1.

C/2006 P1 (McNaught)

C/2006 P1Comet McNaughtC2006P1
The comet was dubbed the Great Comet of 2007 by Space.com.

Comet Ikeya–Seki

Comet Ikeya-SekiC/1965 S1Ikeya–Seki
It proved to be one of the brightest comets seen in the last thousand years, and is sometimes known as the Great Comet of 1965.

Halley's Comet

Comet Halley1P/HalleyHalley
There is no official definition; often the term is attached to comets such as Halley's Comet, which are bright enough to be noticed by casual observers who are not looking for them, and become well known outside the astronomical community.

Decade

decadesdecadaltriennium
Great comets are rare; on average, only one will appear in a decade.

Solar System

outer Solar Systeminner Solar Systemouter planets
The vast majority of comets are never bright enough to be seen by the naked eye, and generally pass through the inner Solar System unseen by anyone except astronomers.

Astronomer

astronomersastrophysicistprofessional astronomers
The vast majority of comets are never bright enough to be seen by the naked eye, and generally pass through the inner Solar System unseen by anyone except astronomers.

Comet nucleus

nucleuscomet nucleicometary nucleus
The requirements for this to occur are: a large and active nucleus, a close approach to the Sun, and a close approach to the Earth.

Sun

solarSolThe Sun
The requirements for this to occur are: a large and active nucleus, a close approach to the Sun, and a close approach to the Earth.

Earth

Earth's surfaceterrestrialworld
The requirements for this to occur are: a large and active nucleus, a close approach to the Sun, and a close approach to the Earth.