The sun during a solar eclipse via NASATomorrow (29 March), there’ll be a partial eclipse of the sun. It won’t fully block out the star’s light here – the sun will instead look a bit like the middle part of that iconic Jaffa Cake ad, as though someone’s taken a bite off its top. Per Royal Museums Greenwich, the eclipse will cover 30-40% of the sun at its peak.The moon will create the effect in the morning, and about 10% of the world is expected to be able to see it. When is the partial eclipse set to happen?It should last almost two hours,