New York, May 2 (AP) Halley's comet swings near Earth every 75 years. But debris left by the comet leads to two major meteor showers every year including the Eta Aquarids.

When this meteor shower lights up the night sky, “you'll know that Earth is crossing the path of the most famous comet,” said Shauna Edson of the Smithsonian's National Air and Space Museum.

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The Eta Aquarids are “pretty fast meteors” said NASA's Bill Cooke.

During Tuesday morning's peak, expect to see 10 to 15 meteors per hour in ideal viewing conditions, said Cooke.

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However, the moon will be nearly two-thirds full, which will likely reduce visibility.

Viewing lasts until May 28. Here's what to know about the Eta Aquarids and other meteor showers.

What is a meteor shower?

As the Earth orbits the sun, several times a year it passes through debris left by passing comets and sometimes asteroids. The source of the Eta Aquarids is debris from Halley's comet.

When these fast-moving space rocks enter Earth's atmosphere, the debris encounters new resistance from the air and becomes very hot, eventually burning up.

Sometimes the surrounding air glows briefly, leaving behind a fiery tail — the end of a “shooting star.”

You don't need special equipment to see the various meteor showers that flash across annually, just a spot away from city lights.

How to view a meteor shower

The best time to watch a meteor shower is in the early predawn hours when the moon is low in the sky.

Competing sources of light — such as a bright moon or artificial glow — are the main obstacles to a clear view of meteors. Cloudless nights when the moon wanes smallest are optimal viewing opportunities.

And keep looking up, not down. Your eyes will be better adapted to spot shooting stars if you aren't checking your phone.

When is the next meteor shower?

The next major meteor shower, the Southern Delta Aquarids, peaks in late July. (AP)

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