The crescent moon is one of the most recognisable things in the night sky. At dusk or dawn, a lot of people have seen a thin, curved line of light in .

The Moon’s surface sometimes flickers with sudden flashes of light, brief glows and color changes that have puzzled astronomers for centuries. These so‑called transient lunar phenomena have long sat ...

In August, an amateur French astronomer, Adrien Coffinet, messaged an email list dedicated to asteroid and comet research with an announcement. He’d identified a new quasi-moon: “2025 PN7 seems to be ...