Watch the 2018 Lyrid meteor shower
If the sky is clear and the Moon isn't too bright, patient stargazers are in for a treat this weekend.
Planetary researcher and stardust expert Dr Ashley King shares his tips on how to get the best view of the Lyrid meteor shower, which is expected to reach a dazzling peak on the morning of 22 April.
Meteors are often called shooting stars, though the bright streaks you see in the sky don't have anything to do with stars.
In fact, what you're wishing on are tiny particles of dust - leftovers from the birth of our solar system - vaporising in Earth's atmosphere.
Tips for watching the Lyrid meteor shower
Some of Lyrid's more spectacular meteors can sometimes be visible from central London however you're bound to get the best experience away from the light pollution of the city.
'The darker the skies, the better your odds are of seeing the really faint ones as well,' Ashley says. 'You could go to the coast or stand on a hill in the middle of the countryside somewhere.'
You also need to be patient.
'You might not be able to see anything for the first 10 minutes while your eyes adjust,' he adds.
'Once you get used to the low light levels you'll begin to notice more and more. So don't give up too quickly.'
What are we actually looking at when we see a meteor shower?
Meteor showers occur when the Earth passes through a stream of tiny pieces of debris (meteoroids) left behind by a comet.
Most comets are composed of dust and ice, which Ashley likens to 'a big, dirty snowball.'
'As comets orbit the sun, the ice melts and the trapped dust is swept out into a tail behind them.'
Nearly all meteors are tiny dust particles, about the size of a grain of sand travelling at tens of kilometres per second through space.
'As they come out of the vacuum of space and into Earth's atmosphere, that little dust grain interacts with all the particles and ions in the atmosphere. It gets heated up by the friction and forms the impressive flash that we see,' he says.
'The Earth isn't close to the comet - it's just passing through some of the dust it left behind.'
Lyrids meteor shower
The Lyrid meteor shower takes place annually between 16-25 April as the Earth in orbit passes through the dust trail left behind (hundreds of years ago) by comet C/186 G1 (Thatcher). This year at the peak of the display, between 10 and 20 meteorites per hour are expected to fall during the hours just before dawn.
The most spectacular are 'Lyrid fireballs', which occur when meteoroids the size of a large marble pass through the atmosphere. Their slightly larger size produces a meteor train which we see as a flash and line across the night sky.
The Lyrids meteor gets its name because it appears to radiate from the area of the sky near the constellation Lyra, the Harp - but the meteors can appear anywhere in the sky.
Comet Thatcher, responsible for the Lyrids meteor shower, takes 415 years to complete a full orbit of the Sun.
We have no photographs because the last time it visited the inner solar system was in 1861 - well before the widespread use of photography.
Other major meteor showers to watch in 2018
- The Lyrids, due to peak on 22 April with 20 meteoroids per hour from the trail of the comet Thatcher
- The Eta Aquariids, due to peak on 6 May with 40 meteoroids per hour from the trail of the comet 1P/Halley
- The Perseids, due to peak on 12-13 August with 100 meteoroids per hour from the trail of the comet 109P/Swift-Tuttle
- The Orionids, due to peak on 21 October with 15 meteoroids per hour from the trail of the comet 1P/Halley
- The Leonids, due to peak on 18 November with 15 meteoroids per hour from the trail of the comet 55P/Tempel-Tuttle
- The Geminids, due to peak on 14 December with 120 meteoroids per hour from the trail of the comet 3200 Phaethon (though Phaethon may actually be an asteroid rather than a comet)
- The Ursids, due to peak on 22 December with 10 meteoroids per hour from the trail of the comet 8P/Tuttle