A new "mini-moon" is temporarily orbiting the Earth.
It was first spotted by scientists at the University of Arizona on Feb. 15.
The mini-moon called "2020 CD3" is about 6 to 11 feet across.
Experts believe it entered the Earth's orbit three years ago.
One of the scientists that discovered the mini-moon, Kacper Wierzchos, said it is “just the second asteroid known to orbit the Earth.”
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