One of the most significant annual meteor showers, the Leonids originate with Comet Tempel-Tuttle, according to Royal Museums Greenwich. So-called “shooting stars” appear when Earth cruises through the old debris field from the comet, both celestial objects orbiting the sun on annually crossing paths.

The Leonid meteor shower has been active all month, but it will be at its strongest Saturday and Sunday nights, according to the American Meteor Society. The shower is best viewed between midnight and dawn, ideally in a place well away from city and street lights.