The details for the Insight Astronomy Photographer of the Year 2018 competition have been released by the Royal Observatory Greenwich, meaning its time to start selecting your best astrophotos for a chance of taking the top spot.
This year, IAPY is marking its tenth anniversary by hosting the winning exhibition in a new dedicated gallery space at the National Maritime Museum, Greenwich.
The exhibition, opening 23 October 2018, will feature the winning astrophotos of the year, plus a selection of some of the best images submitted over the past decade.
Astrophotographers can submit images when the competition opens on Monday 15 January, for the chance of winning the grand prize of £10,000.
Entrants will have until Friday 9 March to enter up to ten images into the various categories.
Insight Astronomy Photographer of the Year 2018 is run by the Royal Observatory Greenwich in association with Insight Investment and BBC Sky at Night Magazine.
The competition has nine main categories: Skyscapes; Aurorae; People and Space; Our Sun; Our Moon; Planets, Comets and Asteroids; Stars and Nebulae; Galaxies and, for those under 16 years old, the Young Astronomy Photographer of the Year.
There are also two special prizes, The Sir Patrick Moore Prize for Best Newcomer and Robotic Scope, which recognises astrophotos taken using one of the many scopes around the world that can be controlled by members of the public via the internet.
As well as the £10,000 grand prize, there are prizes of £1,500 for the winners of each category, £500 for runners up and £250 for highly commended images.
Winners of the special prizes will each receive £750.