A global team of professional and amateur astronomers has found a solar system thousands of light years away that looks like a scaled-down version of our own.

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The NASA rovers Spirit and Opportunity, which began their fourth year on Mars this month, are testing new software as they continue to investigate the planet's hills and craters.

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After years of debate over Pluto's planetary status, the International Astronomical Union voted Thursday to classify the celestial object as a "dwarf planet," thereby shrinking the number of major planets in the solar system to eight.

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