Australia, officially the Commonwealth of Australia

AUSTRALIA
Australia, officially the Commonwealth of Australia, is a sovereign transcontinental country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. With an area of 7,617,930 square kilometres (2,941,300 sq mi), Australia is the largest country by area in Oceania and the world's sixth-largest country. Australia is the oldest, flattest, and driest inhabited continent, with the least fertile soils. It is a megadiverse country, and its size gives it a wide variety of landscapes and climates, with deserts in the centre, tropical rainforests in the north-east, and mountain ranges in the south-east.
Indigenous Australians have inhabited the continent for approximately 65,000 years. The European maritime exploration of Australia commenced in the early 17th century with the arrival of Dutch explorers. In 1770, Australia's eastern half was claimed by Great Britain and initially settled through penal transportation to the colony of New South Wales from 26 January 1788, a date which became Australia's national day. The European population grew steadily in subsequent decades, and by the time of an 1850s gold rush, most of the continent had been explored by European settlers and an additional five self-governing crown colonies established. On 1 January 1901, the six colonies federated, forming the Commonwealth of Australia. Australia has since maintained a stable liberal democratic political system and wealthy market economy. The final constitutional ties between the United Kingdom and Australia ended in 1986 with the passing of the Australia Act 1986 which severed the vestiges of legal dependence on the Parliament of the United Kingdom. Australia became a sovereign, independent and federal nation.
Politically, Australia is a federal parliamentary constitutional monarchy, comprising six states and ten territories. Australia's population of nearly 26 million is highly urbanised and heavily concentrated on the eastern seaboard. Canberra is the nation's capital, while the five largest cities are Sydney, Melbourne, Brisbane, Perth, and Adelaide. Australia's demography has been shaped by centuries of immigration, with immigrants accounting for 30% of the country's population,^[23] the highest proportion among major Western nations.^[24] Australia's abundant natural resources and well-developed international trade relations are crucial to the country's economy, which generates its income from various sources including services, mining exports, banking, manufacturing, agriculture and international education.^[25][26][27]
Australia is a highly developed country with a high-income economy; it has the world's thirteenth-largest economy, tenth-highest per capita income and eighth-highest Human Development Index.^[28] Australia is a regional power, and has the world's thirteenth-highest military expenditure.^[29] Australia ranks highly in quality of life, democracy, health, education, economic freedom, civil liberties, safety, and political rights,^[30] with all its major cities faring exceptionally in global comparative livability surveys.^[31] It is a member of international groupings including the United Nations, the G20, the OECD, the WTO, ANZUS, AUKUS, Five Eyes, the Quad, APEC, the Pacific Islands Forum, the Pacific Community and the Commonwealth of Nations.
Etymology
Main article: Name of Australia
The name Australia (pronounced /əˈstreɪliə/ in Australian English^[32]) is derived from the Latin Terra Australis ("southern land"), a name used for a hypothetical continent in the Southern Hemisphere since ancient times.^[33] When Europeans first began visiting and mapping Australia in the 17th century, the name Terra Australis was naturally applied to the new territories.^{[N 5]}
Until the early 19th century, Australia was best known as New Holland, a name first applied by the Dutch explorer Abel Tasman in 1644 (as Nieuw-Holland) and subsequently anglicised. Terra Australis still saw occasional usage, such as in scientific texts.^{[N 6]} The name Australia was popularised by the explorer Matthew Flinders, who said it was "more agreeable to the ear, and an assimilation to the names of the other great portions of the Earth".^[39] Several famous early cartographers also made use of the word Australia on maps. Gerardus Mercator used the phrase climata australia on his double cordiform map of the world of 1538, as did Gemma Frisius, who was Mercator's teacher and collaborator, on his own cordiform wall map in 1540. Australia appears in a book on astronomy by Cyriaco Jacob zum Barth published in Frankfurt am Main in 1545.^[40] The first time that Australia appears to have been officially used was in April 1817, when Governor Lachlan Macquarie acknowledged the receipt of Flinders' charts of Australia from Lord Bathurst.^[41] In December 1817, Macquarie recommended to the Colonial Office that it be formally adopted.^[42] In 1824, the Admiralty agreed that the continent should be known officially by that name.^[43] The first official published use of the new name came with the publication in 1830 of The Australia Directory by the Hydrographic Office.^[44]
Colloquial names for Australia include "Oz" and "the Land Down Under" (usually shortened to just "Down Under"). Other epithets include "the Great Southern Land", "the Lucky Country", "the Sunburnt Country", and "the Wide Brown Land". The latter two both derive from Dorothea Mackellar's 1908 poem "My Country".^[45]