Quote:Well, this is awkward. Earth’s relationship with the moon is no longer a monogamous one. Scientists have identified a second, mini-moon orbiting our planet that has probably only been around for about 100 years, reports NASA. This second moon looks to be a recently captured asteroid, and like a mistress, its subtle dance with Earth may be fleeting, only sticking around for a few centuries. Still, it’s a remarkable event that proves just how dynamic our gravitational relationship is with near-Earth objects.
Source: https://www.jpl.nasa.gov/news/news.php?feature=6537
News sources:
http://mysteriousearth.net/2016/06/18/ea...says-nasa/
https://www.sciencealert.com/earth-might...econd-moon