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Gold is a chemical element with the symbol Au and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal in a pure form. Chemically, gold is a transition metal and a group 11 element. It is one of the least reactive chemical elements and is solid under standard conditions. Gold often occurs in free elemental, as nuggets or grains, in rocks, veins, and alluvial deposits. It occurs in a solid solution series with the native element silver, naturally alloyed with other metals like copper and palladium, and mineral inclusions such as within pyrite. Less commonly, it occurs in minerals as gold compounds, often with tellurium.
The parsec is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,265 astronomical units (au), i.e. 30.9 trillion kilometres. The parsec unit is obtained by the use of parallax and trigonometry, and is defined as the distance at which 1 au subtends an angle of one arcsecond. This corresponds to 648000/π astronomical units, i.e. . The nearest star, Proxima Centauri, is about 1.3 parsecs from the Sun. Most stars visible to the naked eye are within a few hundred parsecs of the Sun, with the most distant at a few thousand.
Port Adelaide Football Club is a professional Australian rules football club based in Alberton, South Australia. The club's senior men's team plays in the Australian Football League (AFL), where they are nicknamed the Power, whilst its reserves men's team competes in the South Australian National Football League (SANFL), where they are nicknamed the Magpies. Since its founding, the club has won an unequalled 36 SANFL premierships and 4 Championship of Australia titles, in addition to an AFL Premiership in 2004. It has also fielded a women's team in the AFL Women's (AFLW) league since 2022.
The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. It formed 4.6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast majority (99.86%) of the system's mass is in the Sun, with most of the remaining mass contained in the planet Jupiter. The four inner system planets—Mercury, Venus, Earth and Mars—are terrestrial planets, being composed primarily of rock and metal. The four giant planets of the outer system are substantially larger and more massive than the terrestrials. The two largest, Jupiter and Saturn, are gas giants, being composed mainly of hydrogen and helium; the next two, Uranus and Neptune, are ice giants, being composed mostly of volatile substances with relatively high melting points compared with hydrogen and helium, such as water, ammonia, and methane. All eight planets have nearly circular orbits that lie near the plane of Earth's orbit, called the ecliptic.
A Kirkwood gap is a gap or dip in the distribution of the semi-major axes of the orbits of main-belt asteroids. They correspond to the locations of orbital resonances with Jupiter.
Port-au-Prince is the capital and most populous city of Haiti. The city's population was estimated at 987,311 in 2015 with the metropolitan area estimated at a population of 2,618,894. The metropolitan area is defined by the IHSI as including the communes of Port-au-Prince, Delmas, Cite Soleil, Tabarre, Carrefour and Pétion-Ville.
The American University is a private federally chartered research university in Washington, D.C. Its main campus spans 90 acres on Ward Circle, mostly in the Spring Valley neighborhood of Northwest D.C. AU was chartered by an Act of Congress in 1893 at the urging of Methodist bishop John Fletcher Hurst, who sought to create an institution that would promote public service, internationalism, and pragmatic idealism. AU broke ground in 1902, opened as a graduate education institution in 1914, and admitted its first undergraduates in 1925. Although affiliated with the United Methodist Church, religious affiliation is not a criterion for admission.
The St Kilda Football Club, nicknamed the Saints, is a professional Australian rules football club based in Melbourne, Victoria. The club plays in the Australian Football League (AFL), the sport's premier league.
This is a list of local government areas (LGAs) in New South Wales, sorted by region. As of January 2023 there were 128 local government areas in New South Wales, listed below in alphabetical order by region. There is also the Unincorporated Far West Region which is not part of any local government area, in the sparsely inhabited Far West, and Lord Howe Island, which is also unincorporated but self-governed by the Lord Howe Island Board.
The Aten asteroids are a dynamical group of asteroids whose orbits bring them into proximity with Earth. By definition, Atens are Earth-crossing asteroids (a < 1.0 AU and Q > 0.983 AU). The group is named after 2062 Aten, the first of its kind, discovered on 7 January 1976 by American astronomer Eleanor Helin at Palomar Observatory. As of 2020, 1841 Atens have been discovered, of which 13 are named. Many Atens are classified as potentially hazardous asteroids.
An au pair is a helper from a foreign country working for, and living as part of, a host family. Typically, au pairs take on a share of the family's responsibility for childcare as well as some housework, and receive a monetary allowance or stipend for personal use. Au pair arrangements are often subject to government restrictions which specify an age range usually from mid-late teens to mid to late twenties, and may explicitly limit the arrangement to females. The au pair program is considered a form of cultural exchange that gives the family and the au pairs a chance to experience and learn new cultures.
Café au lait is coffee with hot milk added. It differs from white coffee, which is coffee with cold milk or other whiteners added.
.au is the Internet country code top-level domain (ccTLD) for Australia. It was created on 5 March 1986. Domain name policy is managed by .au Domain Administration (auDA). As of July 2018, the registry is operated by Afilias.
news.com.au is an Australian website owned by News Corp Australia. It had 9.6 million unique readers in April 2019 and covers national and international news, lifestyle, travel, entertainment, technology, finance, and sport.
The Australian Bureau of Statistics (ABS) is the independent statutory agency of the Australian Government responsible for statistical collection and analysis and for giving evidence-based advice to federal, state and territory governments. The ABS collects and analyses statistics on economic, population, environmental and social issues, publishing many on their website. The ABS also operates the national Census of Population and Housing that occurs every five years.
The African Union (AU) is a continental union consisting of 55 member states located on the continent of Africa. The AU was announced in the Sirte Declaration in Sirte, Libya, on 9 September 1999, calling for the establishment of the African Union. The bloc was founded on 26 May 2001 in Addis Ababa, Ethiopia, and launched on 9 July 2002 in Durban, South Africa. The intention of the AU was to replace the Organisation of African Unity (OAU), established on 25 May 1963 in Addis Ababa by 32 signatory governments; the OAU was disbanded on 9 July 2002. The most important decisions of the AU are made by the Assembly of the African Union, a semi-annual meeting of the heads of state and government of its member states.
Detached objects are a dynamical class of minor planets in the outer reaches of the Solar System and belong to the broader family of trans-Neptunian objects (TNOs). These objects have orbits whose points of closest approach to the Sun (perihelion) are sufficiently distant from the gravitational influence of Neptune that they are only moderately affected by Neptune and the other known planets: This makes them appear to be "detached" from the rest of the Solar System, except for their attraction to the Sun.
The Big Bash League is an Australian professional club Twenty20 cricket league, which was established in 2011 by Cricket Australia. The Big Bash League replaced the previous competition, the KFC Twenty20 Big Bash, and features eight city-based franchises instead of the six state teams which had participated previously. The competition has been sponsored by fast food-chicken outlet KFC since its inception. It is one of the two T20 cricket leagues, alongside the Indian Premier League, to feature amongst the top ten domestic sport leagues in average attendance. The winner of BBL 11 (2021/2022) was the Perth Scorchers who beat the Sydney Sixers by 79 runs in the final.
References
- ↑ Au at Ethnologue (18th ed., 2015) (subscription required)