‘Fire in the Sky’, Trwyn Du, Anglesey © Adrian Kingsley-Hughes
Nights of Wonder © Dave Brosha
© Valery Shamukov
Crescent Moon Christmas Day over Castle © Grant Ritchie
‘Safe Passage To The Stars’, South Stack, Anglesey © Kris Williams
Entrants can enter five images for the chance to win the top prize of £2,500 and star billing at the Astronomy Photographer of the Year exhibition.
There are nine categories, including Skyscapes, People and Space, and Young Astronomy Photographer of the Year.
The deadline is 16 April and winners will be announced at a ceremony at the Royal Observatory in Greenwich, London on 17 September before going on display.
For full details and to enter visit www.rmg.co.uk/astrophoto.