There are just two weeks to go until the entry deadline for the Royal Observatory's 2014 Astronomy Photographer of the Year competition. Budding astro-photographers need to submit their pictures by midday on 24 April to be in with a chance of winning £1,500 and pride of place in an exhibition opening at the observatory on 18 September 2014.

Photographers can enter their images at, where full competition rules and some top tips are also available. We present some of the photos already entered in this year's competition. Take a look at the official Flickr group for inspiration and to see more.