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Search keyword(s): ' Sean Raymond'   Are We Alone in the Universe? The Search for an Answer Moves from Telescopes to Computers Sean Raymond Category: Science & Technology Published: January 2005 "More than 100 planets have been detected from around other stars in the last 10 years. None of these are thought to support life because they are gas giants. Earth-sized planets have not been discovered yet because it is harder to spot smaller planets."