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The inner Solar System is the region comprising the terrestrial planets and the asteroids. [ 88 ] Composed mainly of silicates and metals, [ 89 ] the objects of the inner Solar System are relatively close to the Sun; the radius of this entire region is less than the distance between the orbits of Jupiter and Saturn.
URL. bbc.co.uk /bitesize. Launched. 1998. Current status. Active. BBC Bitesize, [1] also abbreviated to Bitesize, is the BBC 's free online study support resource for school-age pupils in the United Kingdom. It is designed to aid pupils in both schoolwork and, for older pupils, exams. [2]
e. Mathematics education in the United States varies considerably from one state to the next, and even within a single state. However, with the adoption of the Common Core Standards in most states and the District of Columbia beginning in 2010, mathematics content across the country has moved into closer agreement for each grade level.
The Solar System is one of many planetary systems in the galaxy. [1] [2] The planetary system that contains Earth is named the "Solar" System. The word "solar" is derived from the Latin word for Sun, Sol (genitive Solis). Anything related to the Sun is called "solar": for example, stellar wind from the Sun is called solar wind.
In astronomy, the geocentric model (also known as geocentrism, often exemplified specifically by the Ptolemaic system) is a superseded description of the Universe with Earth at the center. Under most geocentric models, the Sun, Moon, stars, and planets all orbit Earth.
1522 – First circumnavigation of the world by Magellan - Elcano expedition shows that the Earth is, in effect, a sphere. [69] 1543 – Copernicus publishes his heliocentric theory in De revolutionibus orbium coelestium. [70] 1576 – Tycho Brahe founds the first modern astronomical observatory in modern Europe, Uraniborg.
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