Astronomers Have Discovered Earth's Latest Quasi-Lunar Moon As mankind was planning the first moon landing in the 1960s, an asteroid approached Earth--and still hasn't left. The Earth has just added its seventh confirmed quasi-lunar moon. It is 2025 PN7, a small Apollo-type asteroid detected in August solely by its brightness, thanks to the Hawaiian Pan-STARRS 1 telescope. After analyzing its trajectory, scientists concluded that the object maintains a 1:1 resonance with the Earth. From a distant perspective, this synchronicity makes it look as if the Earth is accompanied by a tiny asteroid--as if it had an additional moon.