A 'double punch' of solar storms could smash into Earth and spark widespread auroras this week

Record for hottest day ever recorded on Earth broken twice in a row

Satellites uncover 'invisible' auroras glowing in infrared in Earth's atmosphere

Jules Janssen developed high spatial resolution photography of the solar photosphere in the late 19th century. Images of granules and small sunspots were recorded on 6000 plates through a special telescope but 99 % were destroyed or lost