"NASA's Hubble Space Telescope has taken the first visible-light snapshot of a planet circling another star. The planet, called 'Fomalhaut b', orbits the bright southern star Fomalhaut located 25 light-years from Earth.
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Here is another article about 'Fomalhaut b' in which the second picture shows two of the three planets that orbit HR 8799:
Hopefully in the near future we can image Earth-like planets in other systems.