April 07, 2008

Solar System's 'look-alike' found

Astronomers have discovered a planetary system orbiting a distant star which looks much like our own.

They found two planets that were close matches for Jupiter and Saturn orbiting a star about half the size of our Sun. Martin Dominik, from the St Andrews University, UK, said the finding suggested systems like our own could be much more common than we thought. And he told a major meeting that astronomers were on the brink of finding many more of them.

The St Andrews researcher said this planetary system, and others like it, could host terrestrial planets like Earth. It was just a matter of time before such worlds were detected, he explained. "We found a system with two planets that take the roles of Jupiter and Saturn in our Solar System. These two planets have a similar mass ratio and similar orbital radius and a similar orbital period.

"It looks like this may have formed in a similar way to our Solar System. And if this is the case, it looks like [our] Solar System cannot be unique in the Universe. There should be other similar systems out there which could host terrestrial planets."

About time!

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