A total solar eclipse will cross mainland Spain on August 12 for the first time in more than 100 years, bringing daytime darkness close to sunset across the Iberian Peninsula, as well as parts of Greenland and Iceland.
The moon's shadow will travel from near the North Pole southwards, with totality lasting up to two minutes and 18 seconds. Maximum totality will occur off Iceland's west coast, and by the time the eclipse reaches Portugal and Spain, totality will have reduced to about a minute.
A partial eclipse will be visible much more widely, including in Canada, the northern US, much of Europe and West Africa. The sun will be 94% covered in Dublin, 83% in Oslo, 18% in Montreal, 9% in New York and 2% in Norfolk, Virginia.
Viewers are advised to use special eclipse glasses, even if only a small part of the sun is visible.
The same day will feature six planets forming an arc before dawn and the Perseid meteor shower peaking after nightfall, with meteors potentially visible during totality.