When all three line up exactly, it’s a total eclipse, though tonight is expected to be a "partial" eclipse, as around 90% is expected to be covered. Around the world, this happens every 18 months, but is only visible every 400 years from the same spot. How well are we likely to see it in Fife and what time? According to the Met Office, cloudier conditions will make the viewing more difficult. The Met Office warns that anyone planning to watch the eclipse should do so safely "using certified eclipse glasses or a suitable pinhole projector and should never look directly at the sun".