IIAPY is the world's premier astrophotography competition, each year welcoming thousands of entries from astrophotographers across the globe.
2018 saw over 4,200 entries from 911 photographers, including 186 images from young photographers aged 15 and under.
Find out who won the overall prize this year - plus the winners of each category - in our gallery below.
The winning images are available to view in an exhibition at the National Maritime Museum from 24 October 2018 - 5 May 2019.
Transport the Soul, Brad Goldpaint, Moab, Utah, USA, 20 May 2017. Equipment: Nikon D810 DLSR camera, 14mm f/4.0 lens. Category: People & Space (Overall winner)
Speeding on the Aurora Lane, by Nicolas Lefaudeux, Sirkka, Finland, 30 March 2017. Equipment: Sony ILCE-7S2 camera, 20mm f/1.4 lens. Category: Aurorae
Inverted Colours of the Boundary Between Mare Serenitatis and Mare Tranquillitatis, Jordi Delpeix Borrell, L’Ametlla del Vallès, Barcelona, Spain, 6 December 2017. Equipment: ZWO ASI224MC camera, Celestron EdgeHD 14 Schmidt-Cassegrain, Sky-Watcher NEQ6 Pro mount, 4,200mm f/12 lens. Category: Our Moon.
Sun King, Little King and God of War, Nicolas Lefaudeux, Unity, Oregon, US, 21 August 2017. Equipment: Nikon D810 DSLR camera, Nikkor 105mm f/1.4 AF-S ED lens. Category: Our Sun.
Corona Australis Dust Complex, Mario Cogo, Tivoli Southern Sky Guest Farm, Namibia, 18 August 2017. Equipment: Canon EOS 6D cooling CDS modified DSLR camera, Takahashi FSQ-106 ED refractor, Astro-Physics 1200GTO mount, 530mm f/5 lens. Category: Stars & Nebulae
The Grace of Venus, Martin Lewis, St Albans, Hertfordshire, UK, 15 March 2017. Equipment: ZWO ASI174MM camera, home-made 444mm (17.5-inch) Dobsonian, home-made equatorial tracking platform, Astronomik 807nm IR filter, f/28 lens. Category: Planets, Comets & Asteroids.
Great Autumn Morning, Fabian Dalpiaz (aged 15), Alpe di Siusi, Dolomites, South Tyrol, Italy, 16 October 2017. Equipment: Canon EOS 5D Mark III DSLR camera, 50mm panorama f/2 lens. Category: Young Astronomy Photographer of the Year
Two Comets with the Pleiades, Damian Peach, Remote Astronomical Society Observatory, Mayhill, New Mexico, US, 19 September 2017. Equipment: SBIG STL11000M CCD camera, Takahashi FSQ-106 ED refractor, Paramount ME mount, 530mm f/5 lens. Category: Robotic Scope
NGC 3521, Mysterious Galaxy, by Steve Mohr, Carrapooee, Victoria, Australia, 13 February 2018. Equipment: CDK 12.5-inch astrograph, Astro-Physics 900GTO mount, Baader 2,541mm f/8 lens. Category: Galaxies
Iain Todd is BBC Sky at Night Magazine's Content Editor. He fell in love with the night sky when he caught his first glimpse of Orion, aged 10.
Transport the Soul, Brad Goldpaint, Moab, Utah, USA, 20 May 2017. Equipment: Nikon D810 DLSR camera, 14mm f/4.0 lens. Category: People & Space (Overall winner)
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