“Fomalhaut is like a Hollywood star to astronomers, so we have some personal excitement here,” Seager said. “It feels like finding out that one of your four closest friends just won the lottery big time”.
Fomalhaut is also a young star, about 200 million years old, and its dust ring extends 11 billion to 20 billion miles from its planet, Kalas said. In order not to disturb or roil the dust ring, Fomalhaut’s planet must be less than three Jupiter masses, well within regulation planet size, Kalas and his collaborators calculated.
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