The Royal Observatory Greenwich released the shortlist for the 2015 Insight Astronomy Photographer of the Year competition.

Pictured here: IC443 (UK)

Lying in the constellation of Gemini, IC443 is a galactic supernova remnant, a star that could have exploded as many as 30,000 years ago. Its globular appearance has earned the celestial structure the moniker of the Jellyfish Nebula.

Patrick Gilliland