U.S. space agency-sponsored scientists say they have developed a technique for determining whether Earth-like extrasolar worlds have oceans.
"A 'pale blue dot' is the best picture we will get of an Earth-like extrasolar world using even the most advanced telescopes planned for the next couple decades," Nicolas Cowan of the University of Washington said. "So how do we find out if it is capable of supporting life? If we can determine that the planet has oceans of liquid water, it greatly increases the likelihood that it supports life.
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