Watch the lunar occultation of Uranus on Sept. 14 | Live Science

Depending on where in the world you’ll be Wednesday night (Sept. 14), you may be able to see Uranus disappear. (Don’t worry; it’ll be back again a few hours later.)

On Wednesday, the sixth planet from the sun will appear to pass directly behind Earth’s moon, going completely out of sight for three and a half hours. The great disappearing act, also known as the lunar occultation of Uranus, begins around 4:41 p.m. ET (2041 GMT) and ends by 8:11 p.m. ET (0011 GMT on Sept. 15), according to In-the-sky.org. However, only viewers in Europe, northern Africa and western Asia will be at the exact right angle to see the illusion work.

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What are asteroids? | Live Science

Asteroids are flying space rocks occasionally featured in sci-fi movies and perhaps in our low-level fears of going the way of the dinosaurs. But just what are these potato-shaped chunks of rock, and what are the odds that one could hit Earth sometime in the near future?

“You can think about asteroids as planets that didn’t make it,” Federica Spoto, a research scientist at the Minor Planet Center, an institute that studies small bodies, told Live Science. “They are what’s leftover from the origin of the solar system.”

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