45 may refer to: *

45 (number) 45 (forty-five) is the natural number following 44 (number), 44 and preceding 46 (number), 46. In mathematics Forty-five is the smallest Parity (mathematics), odd number that has more divisors than n+1, and that has a larger sum of divisors tha ...

* one of the years

45 BC __NOTOC__ Year 45 BC was either a common year starting on Thursday, Common year starting on Friday, Friday or Common year starting on Saturday, Saturday or a leap year starting on Friday or Leap year starting on Saturday, Saturday (the sources d ...

AD 45 AD 45 ( XLV) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Vinicius and Corvinus (or, less frequently, year 798 ''Ab urbe condita''). The denomination AD 45 for this year ...

1945 1945 marked the end of World War II, the fall of Nazi Germany, and the Empire of Japan. It is also the year concentration camps were liberated and the only year in which atomic weapons have been used in combat. Events World War II will be ...

, 2045

Film

* ''45'' (2009 film), directed by Peter Coster *

45 (upcoming film) ''45'' is an upcoming Kannada-language action fantasy film directed by Arjun Janya in his directorial debut and produced by Ramesh Reddy under the Suraj Productions banner. It stars Shiva Rajkumar, Upendra, Raj B. Shetty, Jisshu Sengupta an ...

, an upcoming Kannada-language action fantasy film * ''.45'' (film), directed by Gary Lennon (2006)

Music

* ''45'' (Jaguares album), 2008 * ''45'' (Kino album), 1982 * "45" (Bon Iver song), 2016 * "45" (The Gaslight Anthem song), 2012 * "45" (Shinedown song), 2003 * "45" (Elvis Costello song), 2002 *The group

Stars on 45 Stars on 45 was a Dutch novelty pop act that was successful in Europe, the United States and Australia in the early 1980s. The group later shortened its name to Stars On in the U.S., while in the U.K. and Ireland, it was always known as Starsou ...

and its self-titled 1981 song, "

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

Appalachian Incantation ''Appalachian Incantation'' is the fourth studio album by the stoner rock band Karma to Burn. The album was the band's first studio release after a seven-year hiatus that lasted from 2002–2009. It was released on April 30, 2010, on Napalm R ...

'', 2010 *

45 rpm record In music, a single is a type of release of a song recording of fewer tracks than an album ( LP), typically one or two tracks. A single can be released for sale to the public in a variety of physical or digital formats. Singles may be standal ...

or 45, a common form of vinyl single

In science

*The

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 ...

rhodium Rhodium is a chemical element; it has symbol Rh and atomic number 45. It is a very rare, silvery-white, hard, corrosion-resistant transition metal. It is a noble metal and a member of the platinum group. It has only one naturally occurring isot ...

Astronomy

Messier object The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his ' (''Catalogue of Nebulae and Star Clusters''). Because Messier was interested only in finding comets, he created a list of th ...

M45, a

magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of ...

1.4

open cluster An open cluster is a type of star cluster made of tens to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way galaxy, and ...

in the

constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object. The first constellati ...

Taurus Taurus is Latin for 'bull' and may refer to: * Taurus (astrology), the astrological sign ** Vṛṣabha, in vedic astrology * Taurus (constellation), one of the constellations of the zodiac * Taurus (mythology), one of two Greek mythological ch ...

, also known as the

Pleiades The Pleiades (), also known as Seven Sisters and Messier 45 (M45), is an Asterism (astronomy), asterism of an open cluster, open star cluster containing young Stellar classification#Class B, B-type stars in the northwest of the constellation Tau ...

*The

New General Catalogue The ''New General Catalogue of Nebulae and Clusters of Stars'' (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxy, galaxies, star cluste ...

object

NGC 45 NGC 45 is a low surface brightness spiral galaxy in the equatorial constellation of Cetus. It was discovered on 11 November 1835 by the English astronomer John Herschel. The galaxy is located at a distance of 22 million light years and is ...

, a magnitude 10.6

spiral galaxy Spiral galaxies form a galaxy morphological classification, class of galaxy originally described by Edwin Hubble in his 1936 work ''The Realm of the Nebulae''

in the constellation

Cetus Cetus () is a constellation, sometimes called 'the whale' in English. The Cetus (mythology), Cetus was a sea monster in Greek mythology which both Perseus and Heracles needed to slay. Cetus is in the region of the sky that contains other water- ...

Other uses

Donald Trump Donald John Trump (born June 14, 1946) is an American politician, media personality, and businessman who is the 47th president of the United States. A member of the Republican Party (United States), Republican Party, he served as the 45 ...

, the 45th and 47th President of the United States, with the nickname "45" * ''45'' (book), written by Bill Drummond * .45 caliber, a family of firearm cartridges ** A nickname for a handgun chambered in .45 caliber, such as the

M1911 pistol The Colt M1911 (also known as 1911, Colt 1911, Colt .45, or Colt Government in the case of Colt-produced models) is a single-action, recoil-operated, semi-automatic pistol chambered primarily for the .45 ACP cartridge. History Early histo ...

Colt Single Action Army The Colt Single Action Army (also known as the SAA, Model P, Peacemaker, or M1873) is a Trigger (firearms)#Single-action, single-action revolver handgun. It was designed for the U.S. government service revolver trials of 1872 by Colt's Patent Fi ...

.45 ACP The .45 ACP ( Automatic Colt Pistol), also known as .45 Auto, .45 Automatic, or 11.43×23mm is a rimless straight-walled handgun cartridge designed by John Moses Browning in 1904, for use in his prototype Colt semi-automatic pistol. After su ...

, pistol cartridge ** .45 Colt, revolver cartridge *

Jacobite rising of 1745 The Jacobite rising of 1745 was an attempt by Charles Edward Stuart to regain the Monarchy of Great Britain, British throne for his father, James Francis Edward Stuart. It took place during the War of the Austrian Succession, when the bulk of t ...

or "The '45", in the United Kingdom * Forty-fives, a card game *'The 45%', collective term used by

Scottish independence Scottish independence (; ) is the idea of Scotland regaining its independence and once again becoming a sovereign state, independent from the United Kingdom. The term Scottish independence refers to the political movement that is campaignin ...

campaigners (after ratio of support in 2014 referendum) * Fortyfive, a software development company * 45 Eugenia, a main-belt asteroid * Rover 45, a small family car *''The '45'' refers to the

Great Britain Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...

, or the year that

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

ended, which was 1945. * ''45'', a book of essays by record producer

Bill Drummond William Ernest Drummond (born 29 April 1953) is a Scottish artist, musician, writer, and record producer. He was a co-founder of the late-1980s avant-garde pop group the KLF and its 1990s media-manipulating successor, the K Foundation, with wh ...

, derived both from the speed of a pop single and from his age when he finished writing it. *In years of marriage, the

sapphire Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide () with trace amounts of elements such as iron, titanium, cobalt, lead, chromium, vanadium, magnesium, boron, and silicon. The name ''sapphire ...

wedding anniversary A wedding anniversary is the anniversary of the date that a wedding took place. Couples often mark the occasion by celebrating their relationship, either privately or with a larger party. Special celebrations and gifts are often given for partic ...

. * ''Forty-five'' (audio drama), a Big Finish 2008 audio play made for the forty fifth anniversary of the British science fiction television show ''

Doctor Who ''Doctor Who'' is a British science fiction television series broadcast by the BBC since 1963. The series, created by Sydney Newman, C. E. Webber and Donald Wilson (writer and producer), Donald Wilson, depicts the adventures of an extraterre ...

''. {{Numberdis