The way our planet temporarily captures asteroids suggests Earth should have at least one extra moon at any one time.
Asteroids captured by our planet essentially become extra moons, say astronomers.
At any given time, there should be at least one extra "temporary moon" in our orbit.
Maybe Frank should have sung "Fly Me to the Moons."
Scientists studying satellites orbiting the planet have come to an astounding conclusion: Earth has multiple moons at any given time, the MIT Technology Review reported.
Mikael Granvik, along with colleagues at the University of Hawaii, first discovered a mysterious body orbiting the Earth in 2006. The object -- or RH120 as it was known -- turned out to be a tiny asteroid just a few meters across. Moreover, it was a natural satellite just like our moon.
Since then, the researchers have been studying how this "Earth-Moon" gravitational system captures bodies into its orbit while also modelling their frequency and duration. The asteroid RH120 for instance was captured in September 2006 and orbited the planet until June 2007.