The annual Perseid meteor shower is underway.

Earth is passing through a wide stream of debris from Comet Swift-Tuttle, and each time a fleck of comet dust hits Earth's atmosphereflash!there is a meteor.

Forecasters say the shower will peak tonight, and Friday, August 13.

You can see Perseids flitting across the sky at any time between about 10 p.m. on Thursday evening and sunrise on Friday morning.

Observers who get away from city lights can expect to count dozens of meteors per hour, especially during the dark hours before dawn.