Minggu, 09 Desember 2007

2. The Solar System
"WHAT IS THE SOLAR SYSTEM?. The solar system consist of the sun and the many objects that orbit around it --nine planets, over 150 moons, and countless asteroids and comets. The system occupies a disc-shaped volume of space more than 12,000 million km (7,500 million miles) across. At the centre is the sun, which contains more than 99 percent of the Solar System's mass".
(Quoted by Kevin from Visual Encyclopedia of the space, David Hughes and Robin Kerrod, DK London,2006,p.32), 10-12-07

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