What Makes the Perseid Meteor Shower Special

Ask a stargazer to name their favorite night of the year, and there's a good chance they'll say a night in mid-August. Because of one comet that swung through the inner solar system 133 years ago and left a trail of dust behind, we now get an annual show in the skies. Every August, Earth drives straight through that trail, and the result is the Perseid meteor shower. It’s consistently one of the best, brightest, and most reliable light shows the sky puts on all year.

If you've never made a point of watching a meteor shower before, the Perseids are the one to start with. 

The Perseids are debris from Comet 109P/Swift-Tuttle, a comet roughly 16 miles wide that orbits the Sun once every 133 years. Every time it swings through the inner solar system, it sheds a trail of dust and small rocky particles along its path. Earth crosses that debris trail every year in mid-August, and when we do, tiny fragments slam into our atmosphere at around 37 miles per second.

What you're actually seeing is the column of superheated air that each particle creates as it burns up, 50 to 75 miles above the ground. That's why Perseid meteors are so often described as bright and fast. The shower is famous for producing an unusually high number of fireballs, meteors dramatic enough to leave a lingering glowing trail across the sky.

The shower gets its name from the constellation Perseus, because the meteors appear to radiate outward from that part of the sky. You don't need to find Perseus to see them, though. They can streak across any part of the sky, so the best approach is simply to lie back and take in as much of the sky as possible.

Records of the Perseids go back centuries, with observations noted in Chinese and Japanese astronomical writings as early as 36 AD.

When and How to Watch

The Perseids are active for over a month, and the peak usually occurs in mid-August. During peak nights, observers under dark skies can expect to see anywhere from 50 to 100 meteors per hour.

NASA recommends heading outside after midnight and before dawn, since that's when your location on Earth is rotating directly into the debris stream, meaning more meteors, and often brighter ones. The condition of the moon matters too. A bright moon washes out all but the boldest meteors, while a dark, moonless sky lets you see even the faint ones. Check the moon phase for the shower's peak each year before you plan your night out.

The good news about meteor showers, compared to almost everything else in this hobby: you don't need a telescope. In fact, a telescope will actively hurt your chances, since its narrow field of view means you're only looking at a tiny slice of sky at any given moment, and meteors can appear anywhere.

What you actually need is:

• A dark sky. Light pollution is the single biggest thing standing between you and a good show. Get as far from city lights as you reasonably can.

• Time to adapt. Your eyes need 20–30 minutes in the dark to fully adjust. Resist the urge to check your phone during that window — the light will reset your night vision right back to zero.

• Patience and a wide-open view. Lie back, take in as much sky as possible, and give yourself at least an hour. Meteor showers reward the people willing to just sit and watch.

• Warm layers and something comfortable to lie on or sit in. August nights can get cooler than expected, especially well after midnight, and a reclining chair or blanket makes a real difference over an hour or two of neck-craning.

Meteor showers happen throughout the year, but the Perseids consistently rank among the best for a simple reason: high rates, warm summer nights (at least in the Northern Hemisphere), and a shower reliable enough that you can actually plan around it. Unlike a launch that might scrub, or a comet that might fizzle, the Perseids show up every single August, and they have for as long as anyone's been keeping track.

If you catch a clear night around the peak, you're looking at one of the more dependable astronomical events on the calendar — no special equipment, no need to travel anywhere exotic, just a dark patch of sky and a little patience.

Gear Up for Meteor Season

You don't need a telescope for the Perseids, but a few things make the night a lot more comfortable — and give you something to do while you wait between fireballs.

Celestron Night Vision Flashlight — A red-light flashlight is the one piece of gear serious meteor watchers swear by. It lets you check a star chart, find your gear, or take notes without blowing out the night vision you just spent 20 minutes building up.

Astronomy Magazine Planisphere — While you're waiting for the next meteor, a planisphere lets you dial in the date and time and identify exactly what constellations, stars, and planets you're looking at — including Perseus, where all the Perseids appear to radiate from.

National Geographic 16x32 Binoculars — Meteors move too fast for binoculars to help, but a lightweight, wide-field pair is perfect for scanning the Milky Way, star clusters, and satellites during the lulls between meteors — no tripod or setup required.

Written by- Matt Herr