Space & Astronomy
Is the solar system unique ?
By T.K. Randall
February 4, 2009 · 4 comments
Image Credit: R Hurt - JPL/NASA
As advances in science and technology allow us to gain more and more information about planets orbiting distant stars the more we have come to appreciate both the similarities and differences between those systems and our own.
Since the first discovery of a planet orbiting another star in 1992, some 280 alien solar systems have been identified. Most look quite unlike ours, and for good reason. Planets are mainly spied by the way their gravity makes their host star wobble as they orbit. The smaller the planet, the smaller the wobble: lightweight planets like Earth produce effects too small to detect with current technology."
Source: New Scientist
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