For decades, we believed there were nine planets in our solar system—until Pluto was reclassified in 2006. But what if ...

Scientists believe that two asteroids might be fragments of long-lost "planetary embryos" from the early solar system.

Tornados, cyclones and hurricanes wreak havoc on Earth, but scientists have now detected planetary winds on an entirely different scale, far outside the solar system ... planet's equator." At 9 ...