SUMMARY: The European Space Agency is working on a new mission that could be able to detect moons orbiting planets in other star systems. In 2008, the ESA will launch Eddington, which will detect the drop in light as planets as small as Mars pass in front of their parent stars. Astronomers should theoretically be able to detect moons going around those planets because of their gravity - if the planet dims the star a few minutes earlier or later than expected, it will have one or more moons.
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