Moscow is seen this night-time image photographed by the Expedition 30 crew aboard the International Space Station. The Aurora Borealis, airglow and daybreak frame the horizon. - Picture: NASA / Rex Features
Powerful auroras over the city of Tromso, reflecting in the still sea
Picture: Bjorn Jorgensen
Bjorn says: “It is unusual to see the Northern Lights against such a blue sky. This was taken in April, at the end of the Aurora season”
Picture: Bjorn Jorgensen
This photo was taken in September 2008, in the Lofoten islands. It was early at night, so the colours from the sunset were still visible
Picture: Bjorn Jorgensen
A tree is silhouetted against a green sky
Picture: Bjorn Jorgensen
A powerful aurora casts a green glow on the snow on a desolate road on the island of Kvaloya
Picture: Bjorn Jorgensen
The moonlight brightens the snowy landscape in this photo taken at Ersfjord. The bright spot of light on the rock is from a streetlamp 100 metres away
Picture: Bjorn Jorgense
“This photo was taken just after sunset in September 2008, in the Lofoten islands. The sea had turned green from the reflections of the auroras”
Picture: Bjorn Jorgensen
“Green auroras are by far the most common, but they can sometimes show up in purple and deep red, depending on what type of gas the solar wind particles hit in the atmosphere”
Picture: Bjorn Jorgensen
“These bright green auroras seem to be coming from this red boathouse. This was taken near Tromso” Picture: Bjorn Jorgensen
