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When comets travel close to the sun, they heat up and disintegrate.
'In 2021 the Perseid meteor shower is active between 16 July and 23 August, with the number of meteors increasing every night until it reaches a peak in mid-August, after which it will tail off,' according to the Royal Museums Greenwich. In previous years the peak meteor count for the Perseids has been up to 100 meteors per hour, according to NASA, but this week the US space agency expects around 40. The best way to catch a glimpse of the show, which happens every year, is away from the lights of towns, cities, buildings, and trees and where there is a clear view of the horizon.Īt this year's peak, the moon will be in a thin crescent phase, creating perfect viewing conditions without interference from moonlight because it will only be at about 20 per cent illumination.įor stargazers in the Northern Hemisphere, experts recommend watching for the meteor shower after 10pm local time, but it will be at its best during the early hours of dawn.
'If you're in a city, you may only see a few every hour skywatchers in the Southern Hemisphere will also see fewer Perseids, with none visible below about 30 degrees south latitude.' 'If you're in the Northern Hemisphere, and far away from light pollution, you might spot more than 40 Perseids an hour,' NASA said. The meteor shower is often dubbed the best of the year because of how bright and active it is, with up to 40 meteors per hour expected this year. The peak of the Perseids is expected to take place on Thursday night into the early hours of Friday when the sky is at its darkest.