Rocky planet discovered in outer orbit challenges planet formation theory

3 days ago 10
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An international group of astronomers has identified a faraway planetary system that calls into question one of the most widely accepted ideas about how planets take shape.

In most planetary systems observed across the Milky Way, scientists see the same basic layout. Small, rocky planets circle close to their star, while large gas giants orbit at greater distances. Our own Solar System fits this pattern. The inner planets: Mercury, Venus, Earth and Mars, are m...

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