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- There is no evidence that any planet has disappeared from our solar system. However, a computer simulation of the solar system's evolution suggests that the solar system once had five giant gaseous planets rather than the four it has today. The fifth giant was hurled into interstellar space some 4 billion years ago, after a violent encounter with Jupiter1. In 2004, astronomers discovered a planet moving around the star Fomalhaut, which is about 25 light-years away from Earth2.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.The solar system once had five giant gaseous planets rather than the four it has today. That’s the conclusion from a computer simulation of the solar system’s evolution, which suggests the fifth giant was hurled into interstellar space some 4 billion years ago, after a violent encounter with Jupiter.www.newscientist.com/article/dn20952-missing-pla…Fomalhaut b is a ghost with a complicated history. In 2004, Paul Kalas, an astronomer at the University of California, Berkeley, made a surprising find. Using NASA's powerful Hubble telescope, Kalas and his colleagues saw direct evidence of a planet moving around the star Fomalhaut, which is about 25 light-years away from Earth.www.cnet.com/science/astronomers-solve-myster…
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