55 may refer to: *

55 (number) 55 (fifty-five) is the natural number following 54 (number), 54 and preceding 56 (number), 56. Mathematics 55 is: *the 10th Fibonacci number and the 10th triangular number, The sum of 55's digits is also 10. *the 5th heptagonal number, the 5th sq ...

* 55 BC * AD 55 *

1955 Events January * January 3 – José Ramón Guizado becomes president of Panama. * January 17 – , the first nuclear-powered submarine, puts to sea for the first time, from Groton, Connecticut. * January 18– 20 – Battle of Yijian ...

2055 In contemporary history, the third millennium is the current millennium in the ''Anno Domini'' or Common Era, under the Gregorian calendar. It began on 1 January 2001 (Roman numerals, MMI) and will end on 31 December 3000 (Roman numerals, MMM ...

Science

Caesium Caesium (IUPAC spelling; also spelled cesium in American English) is a chemical element; it has Symbol (chemistry), symbol Cs and atomic number 55. It is a soft, silvery-golden alkali metal with a melting point of , which makes it one of only f ...

, by the element's

atomic number The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of its atomic nucleus. For ordinary nuclei composed of protons and neutrons, this is equal to the proton number (''n''p) or the number of pro ...

Astronomy

*Messier object M55, a magnitude 7.0 globular cluster in the constellation Sagittarius *The New General Catalogue object

NGC 55 NGC 55, also known as the String of Pearls Galaxy, is a Magellanic type barred spiral galaxy located about 6.5 million light-years away in the constellation Sculptor. It was discovered on 7 July 1826 by Scottish astronomer James Dunlop. Along ...

, a magnitude 7.9 barred spiral galaxy in the constellation Sculptor * 55 Nights, mixtape by british rapper

Future The future is the time after the past and present. Its arrival is considered inevitable due to the existence of time and the laws of physics. Due to the apparent nature of reality and the unavoidability of the future, everything that currently ex ...

Transportation

*The highest speed limit allowed in the United States between 1974 and 1986 per the

National Maximum Speed Law The National Maximum Speed Limit (NMSL) was a provision of the federal government of the United States 1974 Emergency Highway Energy Conservation Act that effectively prohibited speed limits higher than . The limit was increased to in 1987. I ...

Highway 55 The following highways are numbered 55: International * European route E55 * Arab Mashreq International Road Network, Arab Mashreq route M55 Argentina * Provincial Route 55 (San Luis), San Luis Provincial Route 55 Australia * Carnarvon Highw ...

, several roads *

Route 55 (disambiguation) Route 55 may refer to: *Route 55 (MTA Maryland), a bus route in Baltimore, Maryland and its suburbs * London Buses route 55 * Melbourne tram route 55 See also *List of highways numbered 55 The following highways are numbered 55: Internationa ...

, bus and tram routes *

DAF 55 The DAF 55 is a small family car produced by the Dutch company DAF from December 1967 to September 1972. At that time it was replaced with the DAF 66. All 55s featured the unique Variomatic belt-driven continuously variable transmission, wi ...

, a small family car

Film

*''

55 Days at Peking ''55 Days at Peking'' is a 1963 American epic historical war film dramatizing the siege of the foreign legations' compounds in Beijing (then still Peking, in English) during the Boxer Uprising, which took place in China in the summer of 1 ...

'', a film starring Charlton Heston and David Niven

Other uses

*''

Gazeta 55 ''Gazeta 55'' () is an Albanian language newspaper published in Tirana, Albania. The newspaper is a politically unaffiliated daily, with nine reporters on staff records. The tabloid's owner is Fahri Balliu, an Albanian businessman. History and p ...

'', an Albanian newspaper *

Agitation and Propaganda against the State Constitution 55, or Agitation and Propaganda against the State (), was a criminal offence in Communist Albania. This law was used from 1945 until 1991 and was part of the Constitution of the People's Socialist Republic of Albania. The term was i ...

, also known as Constitution law 55, a law during Communist Albania * +55, the code for international direct dial phone calls to Brazil *5:5, law enforcement code for

handcuffs Handcuffs are Physical restraint, restraint devices designed to secure an individual's wrists in proximity to each other. They comprise two parts, linked together by a Link chain, chain, a hinge, or rigid bar. Each cuff has a rotating arm whi ...

* ''55'' (album), by the Knocks *"55", a 2022 song by

Raymix Edmundo Gómez Moreno (born 17 February 1991), better known by his stage name Raymix, is a Mexican musician and aerospace engineer. Nicknamed El Rey de la Electrocumbia ("The King of Electrocumbia"), Raymix started his music career in the ...

*"55 (Hamsa oua Hamsine)", an instrumental by the Master Musicians of Joujouka from ''

Brian Jones Presents the Pipes of Pan at Joujouka ''Brian Jones Presents the Pipes of Pan at Joujouka'' is an album by the Moroccan group the Master Musicians of Joujouka, released on Rolling Stones Records and distributed by Atco Records in 1971. It was produced by Brian Jones of the Rolli ...

'' *"Fifty Five", a song by Karma to Burn from the album ''

Arch Stanton ''Arch Stanton'' is the sixth studio album by the instrumental An instrumental or instrumental song is music without any vocals, although it might include some inarticulate vocals, such as shouted backup vocals in a big band setting. Throug ...

'', 2014 *

55 Pandora 55 Pandora is a fairly large and very bright asteroid in the asteroid belt. Pandora was discovered by American astronomer and Catholic priest George Mary Searle on September 10, 1858, from the Dudley Observatory near Albany, NY. It was his f ...

, a main-belt asteroid