The solar eclipse will cast a deep shadow over Britain on Friday (March 20) for the first time this century.
Parts of the country will experience 99% darkness when the moon passes between the sun and the Earth and casts a shadow over the Earth's surface.
Outdoor events will be held nationwide as people gather to watch the spectacular event, which will not happen again until August 12, 2026.
The partial eclipse will affect the whole of Britain, but where is the best spot to watch it?
The total eclipse will be taking place over the North Atlantic - starting from a spot 400 miles south of Greenland.
It will skirt the south of Iceland, pass over the Faroe Islands and the Norwegian territory of Svalbard, and finish over the North Pole.
Unlike 1999, Britain will not be plunged into total darkness, but the effect is expected to be incredible.
Shortly after 8am on Friday, the skies will start to grow dark and just over an hour later, about nine-tenths of the sun will be blocked out - although the amount will vary throughout the country.
In London, the eclipse will occur at 9.31am and 84% of the sun's rays will be blocked out.
It won't be until nearly 11am that the sun will finally be restored to its full glory.
In Britain, the farther north you go, the darker it will be, making Scotland the best place to travel to - and on the Isle of Lewis in the Outer Hebrides, nearly 98% of the sun will be covered.
But even further south, the effect will be impressive - in Dover there will be an 82% eclipse.
The partial eclipse is expected to be the most impressive if there is no cloud cover, but early weather forecasts predict their could be some rain.
But assuming the weather holds out, astronomical societies are arranging events up and down the country where people can watch the event and talk to experts about the phenomenon.
The BBC is erecting big screens in cities across the country including two in London - at Waltham Forest and Woolwich.
Originally published on Mirror Online.