WASHINGTON (AP) — The Lyrid meteor shower is underway. But with a nearly full moon in the sky during the peak, it might be tough to see clearly.

The Lyrids occur every year in mid-to-late April. This year’s peak activity happens Sunday into Monday, with 10 to 20 meteors expected per hour. Viewing lasts through April 29.

Here’s what to know about the Lyrids and other meteor showers.

What is a meteor shower?

Multiple meteor showers occur annually and you don’t need special equipment to see them.

Most meteor showers originate from the debris of comets. The source of the Lyrids is the comet Thatcher.

When rocks from space enter Earth’s atmosphere, the resistance from the air makes them very hot. This causes the air to glow around them and briefly leaves a fiery tail behind them — the end of a “shooting star.”

The glowing pockets of air around fast-moving space rocks, ranging from the size of a dust particle to a boulder, may be visible in the night sky.