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New planet detection technique can spot even small worlds around distant...

An extrasolar planet has been discovered using a new technique that will allow astronomers to detect planets no other current method can. Planets around other stars have been previously detected only by the effect they have on their parent star, limiting the observations to large, Jupiter-like planets and those in very tight orbits. The new method uses the patterns created in the dust surrounding a star to discern the presence of a planet that could be as small as Earth or in an orbit so wide that it would take hundreds of years to observe its effect on its star.

Time to adjust the compass?

Working high in the Canadian Arctic, researchers from the University of Rochester say they've found that several aspects of the powerhouse that drives the Earth's magnetic field may be related. That's new in itself. But the team also thinks it may indicate our planet's about ready for a pole reversal, in which all compasses will begin pointing south.

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