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173 (number)
173 (one hundred ndseventy-three) is the natural number following 172 and preceding 174. In mathematics 173 is: *an odd number. *a deficient number. *an odious number. *a balanced prime. *an Eisenstein prime with no imaginary part. *a Sophie Germain prime. *an inconsummate number. *the sum of 2 squares: 22 + 132. *the sum of three consecutive prime numbers: 53 + 59 + 61. * Palindromic number in bases 3 (201023) and 9 (2129). In astronomy * 173 Ino is a large dark main belt asteroid * 173P/Mueller is a periodic comet in the Solar System * Arp 173 (VV 296, KPG 439) is a pair of galaxies in the constellation Boötes In the military * 173rd Air Refueling Squadron unit of the Nebraska Air National Guard * 173rd Airborne Brigade Combat Team of the United States Army based in Vicenza * 173rd Battalion unit of the Canadian Expeditionary Force during the World War I * 173rd Surveillance Squadron (Australia) of the Australian Army at Oakey, Queensland * K-173 ''Chelya ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prime Number
A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways of writing it as a product, or , involve 5 itself. However, 4 is composite because it is a product (2 × 2) in which both numbers are smaller than 4. Primes are central in number theory because of the fundamental theorem of arithmetic: every natural number greater than 1 is either a prime itself or can be factorized as a product of primes that is unique up to their order. The property of being prime is called primality. A simple but slow method of checking the primality of a given number n, called trial division, tests whether n is a multiple of any integer between 2 and \sqrt. Faster algorithms include the Miller–Rabin primality test, which is fast but has a small chance of error, and the AKS primality test, which always pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteroid
An asteroid is a minor planet of the inner Solar System. Sizes and shapes of asteroids vary significantly, ranging from 1-meter rocks to a dwarf planet almost 1000 km in diameter; they are rocky, metallic or icy bodies with no atmosphere. Of the roughly one million known asteroids the greatest number are located between the orbits of Mars and Jupiter, approximately 2 to 4 AU from the Sun, in the main asteroid belt. Asteroids are generally classified to be of three types: C-type, M-type, and S-type. These were named after and are generally identified with carbonaceous, metallic, and silicaceous compositions, respectively. The size of asteroids varies greatly; the largest, Ceres, is almost across and qualifies as a dwarf planet. The total mass of all the asteroids combined is only 3% that of Earth's Moon. The majority of main belt asteroids follow slightly elliptical, stable orbits, revolving in the same direction as the Earth and taking from three to six years to comple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
173rd Battalion (Canadian Highlanders), CEF
The 173rd (Highlanders) Battalion, CEF, was a unit in the Canadian Expeditionary Force during the First World War. One of a number of Highlander battalions in the Canadian Expeditionary Force, it was based in Hamilton, Ontario, and began recruiting during the winter of 1915/16. The unit sailed for England on November 14, 1916, on the , with 32 officers and 950 other ranks. Of the 950 other ranks, 741 had attested with the 173rd, 145 with the 213rd Battalion, CEF, and 32 with 23 different units. On January 17, 1917, the 173rd arrived at Bramshott where on January 19 it became part of the 2nd Reserve Battalion of the 6th Reserve Brigade. The 2nd Reserve Battalion was designated to supply drafts for the 125th and 116th Battalions, CEF. The 173rd (Highlanders) Battalion had one Officer Commanding: Lieut-Col. W. H. Bruce. The battalion has been perpetuated by the Argyll and Sutherland Highlanders of Canada since 1920. See also *List of infantry battalions in the Canadian E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vicenza
Vicenza ( , ; ) is a city in northeastern Italy. It is in the Veneto region at the northern base of the ''Monte Berico'', where it straddles the Bacchiglione River. Vicenza is approximately west of Venice and east of Milan. Vicenza is a thriving and cosmopolitan city, with a rich history and culture, and many museums, art galleries, piazzas, villas, churches and elegant Renaissance '' palazzi''. With the Palladian Villas of the Veneto in the surrounding area, and his renowned ''Teatro Olimpico'' (Olympic Theater), the "city of Palladio" has been listed as a UNESCO World Heritage Site since 1994. In December 2008, Vicenza had an estimated population of 115,927 and a metropolitan area of 270,000. Vicenza is the third-largest Italian industrial centre as measured by the value of its exports, and is one of the country's wealthiest cities, in large part due to its textile and steel industries, which employ tens of thousands. Additionally, about one fifth of the country's gold a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Army
The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, clause 1 of the United States Constitution (1789). See alsTitle 10, Subtitle B, Chapter 301, Section 3001 The oldest and most senior branch of the U.S. military in order of precedence, the modern U.S. Army has its roots in the Continental Army, which was formed 14 June 1775 to fight the American Revolutionary War (1775–1783)—before the United States was established as a country. After the Revolutionary War, the Congress of the Confederation created the United States Army on 3 June 1784 to replace the disbanded Continental Army.Library of CongressJournals of the Continental Congress, Volume 27/ref> The United States Army considers itself to be a continuation of the Continental Army, and thus considers its institutional inception to be th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
173rd Airborne Brigade Combat Team (United States)
The 173rd Airborne Brigade ("Sky Soldiers") is an airborne infantry brigade combat team (IBCT) of the United States Army based in Vicenza, Italy. It is the United States European Command's conventional airborne strategic response force for Europe.The 173rd Airborne Brigade History, Our History skysoldiers.army.mil, last accessed 21 December 2020 Activated in 1915, as the 173rd Infantry Brigade, the unit saw service in but is best known for its actions during the . The brigade was the first major United States Army ground fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nebraska Air National Guard
The Nebraska Air National Guard (NE ANG) is the aerial militia of the State of Nebraska Nebraska () is a state in the Midwestern region of the United States. It is bordered by South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Kansas to the south; Colorado to the s ..., United States, United States of America. It is, along with the Nebraska Army National Guard, an element of the Nebraska National Guard. As state militia units, the units in the Nebraska Air National Guard are not in the normal United States Air Force command hierarchy, chain of command. They are under the jurisdiction of the Governor of Nebraska though the office of the state adjutant general, Nebraska Adjutant General unless they are federalized by order of the President of the United States. The Nebraska Air National Guard is headquartered at Lincoln Air National Guard Base, and its commander is Brigadier General Wendy Johnson. Overview Und ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
173rd Air Refueling Squadron
The 173d Air Refueling Squadron (173d ARS) is a unit of the Nebraska Air National Guard 155th Air Refueling Wing. It is assigned to Lincoln Air National Guard Base, Nebraska and is equipped with the Boeing KC-135 Stratotanker. History World War II : ''see 401st Fighter Squadron for full World War II history'' The 401st Fighter Squadron was established on 22 July 1943 at Westover Field, Massachusetts and equipped with P-47 Thunderbolts. Deployed to the European Theater of Operations (ETO) and assigned to Ninth Air Force in England, it engaged in combat operations until May 1945. It returned to the United States during September–November 1945, and was inactivated on 7 November 1945. Nebraska Air National Guard The unit was allotted to the National Guard on 24 May 1946 and redesignated the 173rd Fighter Squadron, and was further allotted to the Nebraska Air National Guard. It was organized and federally recognized as a P-51D Mustang squadron in July 1946. It was the second Air N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boötes
Boötes ( ) is a constellation in the northern sky, located between 0° and +60° declination, and 13 and 16 hours of right ascension on the celestial sphere. The name comes from la, Boōtēs, which comes from grc-gre, Βοώτης, Boṓtēs ' herdsman' or 'plowman' (literally, ' ox-driver'; from ''boûs'' 'cow'). One of the 48 constellations described by the 2nd-century astronomer Ptolemy, Boötes is now one of the 88 modern constellations. It contains the fourth-brightest star in the night sky, the orange giant Arcturus. Epsilon Boötis, or Izar, is a colourful multiple star popular with amateur astronomers. Boötes is home to many other bright stars, including eight above the fourth magnitude and an additional 21 above the fifth magnitude, making a total of 29 stars easily visible to the naked eye. History and mythology In ancient Babylon, the stars of Boötes were known as SHU.PA. They were apparently depicted as the god Enlil, who was the leader of the Babylonian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 origins of the earliest constellations likely go back to prehistory. People used them to relate stories of their beliefs, experiences, creation myth, creation, or mythology. Different cultures and countries adopted their own constellations, some of which lasted into the early 20th century before today's constellations were internationally recognized. The recognition of constellations has changed significantly over time. Many changed in size or shape. Some became popular, only to drop into obscurity. Some were limited to a single culture or nation. The 48 traditional Western constellations are Greek. They are given in Aratus' work ''Phenomena'' and Ptolemy's ''Almagest'', though their origin probably predates these works by several centuries. Constellation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galaxy
A galaxy is a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity. The word is derived from the Greek ' (), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System. Galaxies, averaging an estimated 100 million stars, range in size from dwarfs with less than a hundred million stars, to the largest galaxies known – supergiants with one hundred trillion stars, each orbiting its galaxy's center of mass. Most of the mass in a typical galaxy is in the form of dark matter, with only a few percent of that mass visible in the form of stars and nebulae. Supermassive black holes are a common feature at the centres of galaxies. Galaxies are categorized according to their visual morphology as elliptical, spiral, or irregular. Many are thought to have supermassive black holes at their centers. The Milky Way's central black hole, known as Sagittarius A*, has a mass four million times greater than the Sun. As o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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