Night

Northern lights (Aurora borelias) are seen over the city of Tromso in northern Norway.

Jan Morten/scanpix/AFP

Northern lights (Aurora borelias) over the city of Tromso in northern Norway.

A slow-shutter exposure shows an aerial view of evening traffic in Shanghai on January 9, 2014. China's auto sales smashed through the 20 million mark last year, growing nearly 14 percent and extending its lead as the world's biggest car market, an industry group said on January 9.

Peter Parks/AFP

An aerial view of evening traffic in Shanghai. China’s auto sales smashed through the 20m mark last year, growing nearly 14% and extending its lead as the world’s biggest car market, an industry group said on Thursday

A cruise ship sails out from Trieste harbor, northern Italy, at sunset.

Luca Bruno/AP

A cruise ship sails out from Trieste harbour, northern Italy, at sunset

An aerial view at night of the downtown Chicago skyline. An Arctic air mass is expected to chill much of the Central Plains and the East Coast through Monday with wind-chill temperatures dropping into the single digits overnight in some places.

Kiichiro Sato/AP

A nightime aerial view of downtown in the US city of Chicago

An airplane flies past the supermoon near Madrid, Spain early on Monday. The 'supermoon' filled the sky on 23rd June and looked 14 per cent bigger and 30 per cent brighter than normal, which is the closest approach to Earth.

Chema Moya/EPA

An aeroplane flies past the moon near Madrid, Spain, early on Monday. The ‘supermoon’ filled the sky on June 23 and looked 14 per cent bigger and 30 per cent brighter than normal, which is the closest approach to Earth.