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The Solar System. The Solar System. c onsists of the Sun and all the celestial bodies that surround it. The S un. is at the centre of the Solar system and is its only star. Everything. i n the Solar System orbits the Sun :
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The Solar System • consists of theSun and allthe celestial bodiesthatsurroundit.
TheSun • is at the centre of the Solar system and isitsonlystar.
Everything • in the Solar SystemorbitstheSun: the 8 planets, theirsatellites, dwarfplanets, asteroids and comets.
Theplanets • They are large, sphere-shapedbodies. • TheytravelaroundtheSun in analmost circular pathcalledanorbit. • Thereare twomaingroups.
Theinnerplanets • These are thefourplanetsclosesttotheSun. • Theyhave a rockysurface. • TheclosestplanettotheSunis Mercury, followedby Venus, theEarth, Mars.
Theouterplanets • These are thefourplanetsfarthestawayfromtheSun. • They are muchlargerthaninnerplanetsand they are composedmainly of gas (“gas giants”) • TheclosestouterplanettotheSunisJupiter, followedbySaturn, Uranus, thenNeptune.
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