A star will graze our solar system in a million years

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In just over a million years, Earth inhabitants will get a closer look at a star than they might want. Gliese 710 is currently a safe 64 light years away, but scientists discovered in 1999 that the sun-like star was barreling directly toward us at around 32,000 mph. We've known for awhile that it would closely pass by our solar system, but Polish astronomers have calculated that it could end up a mere 77 light days away. That would easily be close enough to deflect the orbit of asteroids or comets in our solar system's Oort Cloud, potentially toward Earth.

That's about five times closer than previously thought, astronomers from Adam Mickiewicz University in Poland say. To arrive at that figure, they used measurements from ESA's Gaia space observatory that are ten times more accurate than before. There's still an error of around 50 percent, however, so the star could actually come as close as 7,250 astronomical units (AUs) or around 0.11 light years (40 light days).

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A million years is certainly a long time from now, but in geologic terms not really. Neat to think that a star is going to pass so close by.