Has Earth acquired a second moon? Not exactly.

Astronomers recently discovered a new quasi-moon. This asteroid with a diameter of 50 feet will be accompanying Earth as it orbits the Sun for the next 60 years, astronomers estimated in a study published in September in the journal American Astronomical Society .

Dubbed "2025 PN7 ," the quasi-moon is actually one of many quasi-moons sharing Earth's orbit.

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