Follow us on Twitter to get involved, ask questions, take part in the event and enjoy the night sky with us. Images and other information will be tweeted as it happens.
Everyone is welcome to join in, whether they are an astronomer or just have an interest in the night sky.
This event follows on from the popular Twitter Moonwatch held in May 2009
The highlight of the summer meteor showers, the Perseids reach maximum around 11 and 12 August and may put on a display of aproximately 80 to 100 meteors per hour under ideal conditions. Conditions this year aren’t ideal but meteors every few minutes are still quite possible. Perseid meteors are often bright with persistent trails which can linger for a while after the meteor has burned up.
Other main objects of interest on both evenings will be: the planet Jupiter and the Moon. The planets Mars and Venus will also be visible if you stay up to the small hours.
The Twitter Meteorwatch will start at 21.30 BST on 11 August and will continue through to the evening of the 12 August. Amateur and professional astronomers from the US and other countries are invited to join in and take over from the UK, when the sun comes up here, helping make the event run for over 24 hours and be truly international. The event will close in the UK, in the early hours of 13 August 2009.