A Rogue Star Could Hurl Earth Into Deep Space, Study Warns

Billions of years from now, the Sun will swell into a red giant, swallowing Mercury, Venus, and Earth. But that’s not the only way our planet could meet its demise. A new simulation points to the menacing threat of a passing field star that could cause the planets in the solar system to collide or fling Earth far from the Sun. When attempting to model the evolution of the solar system, astronomers have often treated our host star and its orbiting planets as an isolated system. In reality, however, the Milky Way is teeming with stars that may get too close and threaten the stability of the solar system. A new study, published in the journal Icarus, suggests that stars passing close to the solar system will likely influence the orbits of the planets, causing another planet to smack into Earth or send our home planet flying. In most cases, passing stars are inconsequential, but one could trigger chaos in the solar system—mainly because of a single planet. The closest planet to the Sun, ... Read full article.