Astronomers have found that Earth has acquired a new cosmic partner, a tiny asteroid named 2025 PN7, which will orbit with our planet for approximately 50 years. Though described by some as a “mini-moon,” scientists clarify that it is not actually a satellite like our Moon. Rather, it’s a quasi-moon, an uncommon variety of asteroid that moves in almost the same orbit and velocity as Earth around the Sun, giving the illusion that it is orbiting our planet. Measured to be roughly 19 metres in diameter, 2025 PN7 was discovered in August 2025 and is set to continue being close to Earth’s orbit until some time after 2083 before slowly moving away into outer space.