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Written by Mar
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Tuesday, 20 May 2008 00:36 |
The solar system comprises the Earth's Sun and the retinue of celestial objects gravitationally bound to it. Traditionally, this is said to consist of the Sun, nine planets and their 158 currently known moons; however, a large number of other objects, including asteroids, meteoroids, planetoids, comets, and interplanetary dust orbit the Sun as well. Astronomers are debating the classification of a potential tenth planet and other trans-Neptunian objects.
Although the term "solar sys ... |
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Written by Daniel Yergin
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Thursday, 22 November 2007 16:27 |
The energy challenge certainly ranks at the top of the world's agenda. What makes it particularly difficult to deal with is that it is created by two forces.
Though not usually put in these terms, one is globalization-and, in particular-the success of globalization. High growth rates, the emergence of large middle classes in countries like China and India, the continuing integration of the global economy-all this is powered by energy. To keep it going requires energy, lots of it.
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