A chunk of space rock that visited near Earth's orbit last year was widely referred to as a "mini-moon." Turns out the lunar-inspired moniker may have been more accurate than we realized.

New research suggests that Earth's recent mini-moon might have originated as part of our actual moon long, long ago.

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A small space rock that lingered near Earth last year and was referred to as its temporary “mini-moon” may actually be a chunk of the moon that chipped off thousands of years ago. The celestial ...