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Webb Sees a System That Just Finished Forming its Planets
When a young star begins forming, it's spinning rapidly, surrounded by a flattened disk that grows its future planets. Once the star can ignite fusion in its core, its stellar winds kick in, clearing out the remaining gas and dust, starving its planets for material. Now, JWST has found an older star in this exact phase of the cycle, dispersing its gas into interstellar space. This limits how much larger the planets can become until no material remains.
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