Science

Perseid meteors to light up night sky in one of the year’s most active showers

The Perseid meteor shower will light up the night sky over the next five weeks.​The Perseid meteor shower will light up the night sky over the next five weeks. 

Different length white streaks radiate outwards from a colourful night skyImage source, Getty/bjdlzx
By BBC Weather

The Perseid meteor shower is set to light up the night sky over the next month, putting on a spectacular treat for skygazers.

Known as one of the brightest, fastest and most active meteor showers of the year, it occurs when Earth passes through the debris of Comet 109P/Swift-Tuttle.

Running from 17 July to 24 August, the show will peak overnight on the 12-13 August.

Coinciding with the new Moon, dark skies will create ideal viewing conditions for the peak where the weather cooperates.

What is the Perseid meteor shower and how can I see it?

Meteor showers happen when dust from a passing comet or asteroid passes through the Earth’s atmosphere.

The tiny particles – roughly the size of a grain of sand – vaporise, creating visible streaks of light.

In the most dense parts of the dust stream, more meteors are visible.

The Perseids in particular are known for being a very active shower, where up to 150 meteors per hour are possible during its peak.

The shower is also famous for its bright “fireball” meteors.

To spot them, skygazers should look for the point in the sky where they appear to originate from, known as the radiant.

In this case, it is in the constellation of Perseus.

A white meteor with its characteristic green trail amidst a dark blue night sky is pictured in front of the Milky Way, during the peak of the Perseid meteor showerImage source, VALENTIN FLAURAUD/EPA-EFE/REX/Shutterstock

It is easiest to spot meteors in the northern hemisphere between midnight and an hour before sunrise, but of course it is dependent on cloud cover.

Ideal conditions for viewing are dark, clear skies with a wide unobstructed view. You don’t need binoculars or a telescope.

The further away from light pollution you are, the better chance you will have of seeing the meteors. You should give your eyes up to 15 minutes to adapt to the lower light.

What is the night-sky forecast for the week ahead?

High pressure to the west will dominate the weather through the week ahead bringing mostly dry and settled conditions.

A northerly wind will continue to draw in more North Sea cloud across northern Scotland and towards eastern coasts, reducing viewing chances during the next few nights.

Towards the south and west, skies will generally stay clearer for longer.

During the second half of this week, eastern parts of Scotland and England will see clearer night skies as the northerly wind eases.

You can check the conditions where you are at BBC Weather online, or on the app.

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