Comet Neowise's spectacular journey – in pictures

Comet Neowise was discovered on 27 March by Nasa's Near-Earth Object Wide-field Infrared Survey Explorer (NEOWISE) mission. Scientists say the comet is about 3 miles across. Its nucleus is covered with sooty material dating back to the origin of our solar system 4.6bn years ago. It is the brightest comet visible from the northern hemisphere in 25 years