Millions of people could witness the best solar eclipse in years.
A path across the Earth’s surface will be plunged into darkness as the Moon covers up the Sun, the BBC reports.
Experts are warning people not to look directly at the Sun because it could cause serious harm.
The deep shadow forms first in the North Atlantic, before sweeping up into the Arctic Circle and ending at the North Pole.
Wherever people view the eclipse, they are strongly encouraged to do so in a safe way.
For many, this will be the first such event they have experienced while owning a smartphone, and they may be tempted to use the device to get a shot of the Moon passing in front of the Sun.
Of itself, this action is not dangerous, but there is a risk of looking into the Sun around the edge of the phone as the screen is lined up.