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Kepler spots four rogue Earth-mass exoplanets floating in space, unbound to any star

ThatOne Silver badge
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As far as we humans are concerned, pretty close... It might not mean immediate destruction if it doesn't hit Earth, but it will certainly throw a spanner in the delicate, fine-tuned orbital system, resulting in orbits changing and bad things eventually happen.

That been said, it doesn't really have to hit anything (unlikely anyway), a simple flyby of a weighty Earth-sized planet would create enough perturbations in the inner planets' orbits, and most certainly eject a massive hailstorm of asteroids out from the eponymous belt.

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