The 900-foot asteroid flying by Earth on Wednesday

Meet Apophis — a giant space rock named after an Egyptian demon

Don't panic: This is not going to happen.
(Image credit: Thinkstock)

Watch out: Astronomers have spotted a 900-foot-wide asteroid hurtling in the general direction of our feeble little planet. The asteroid is set to fly by on Wednesday, and the good news is it probably won't hit us. (It probably won't even come within 9 million miles of us — about one-tenth the distance of the Earth to the Sun.) But circle your calendars: There remains a small chance that it could collide with Earth when it circles back again in 2036.

Apophis, as they call it, is named after a mythical Egyptian demon, and is surprising astronomers because it's a lot larger than initially suspected. When it was first spotted in 2004, space watchers calculated that Apophis had an alarmingly high chance of slamming into Earth come 2029 — one in 45, to be specific. Its orbit was recently re-calibrated, however, and experts say it's no longer a threat in 2029.

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Chris Gayomali is the science and technology editor for TheWeek.com. Previously, he was a tech reporter at TIME. His work has also appeared in Men's Journal, Esquire, and The Atlantic, among other places. Follow him on Twitter and Facebook.