ORIGIN OF EARTH'S 'SECOND MOON' DISCOVERED

Asteroid sampling mission will confirm whether moon-like Kamo'oalewa came from our Moon

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If you were told that the Moon we see in our night sky isn't Earth's only one, you'd probably be a bit surprised. But some people have started to call the strange object that seems to orbit our planet, Earth's 'second moon' - and now scientists may have discovered where it came from.

In fact, there are many moon-like objects around us in space, but only a handful of the over 200,000 'near-Earth asteroids' (NEAs) have similar orbits to Earth.