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Friday 5 July 2013

THE UNIVERSE





Earth is the third planet from the Sun and the fifth largest:
Radius: 6,371 km
Age: 4.54 billion years
Distance from Sun: 149,600,000 km
Mass: 5.972E24 kg
Population: 6.974 billion (2011) World Bank


The Sun's power (about 386 billion billion megaWatts) is produced by nuclear fusion reactions. Each second about 700,000,000 tons of hydrogen are converted to about 695,000,000 tons of helium and 5,000,000 tons of energy in the form of gamma rays.
                                                           





Antares is the 15th brightest star in the sky. It is more than 1000 light years away.

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