THE SOLAR SYSTEM consists of a central star (the sun) and the bodies that orbit it.These bodies include nine planets and their 61 moons ;asteroids ,comets,and meteoroids.The solar system also contain interplanetary gas and dust.Most of the planets fall into two groups ;four small rocky planets near the sun (Mercury,Venus,Earth,Mars,) and four planets further out , the gas giants(Jupiter,Saturn,Uranus, and Neptune.)Pluto is the outermost planet , except when it passes briefly inside Neptune's orbit.Between the rocky planets and the gas giants is the asteroid belt , which contains thousands of chunks of rock orbiting the Sun.Most of the bodies in the Solar System move around he Sun in elliptical orbits located in a thin disc around the Sun's equator .All the planets orbit the sun in the same direction (anticlockwise) when viewed from above) and all but Venus ,Uranus and Pluto also spin about their axes in this direction.Moons also spin as they , in turn orbit their planets.The entire Solar System orbits the centre of our galaxy , the Milky way.
INDUSTRIAL REVOLUTION Starts in Europe particularly in England in eighteen century.It changed the whole of Europe and England 's economy.During this period New machines are invented in England to speed up the spinning of wool and cotton .At first they were powered by water wheels but later steam engines are developed.Iron become cheaper and stronger as Iron making techniques improved.Canals are dug to carry coal from the mines and to transport finished goods.After ...
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