The Royal Observatory at Greenwich has one of the more unusual tourist attractions in the world: a line on the ground. Visitors queue for a photograph straddling it, one foot in the eastern hemisphere ...

If you use your smartphone’s GPS to find Earth’s prime meridian – the north-south line marking zero degrees longitude – at Greenwich Observatory, you’ll notice something a bit odd. You won’t be ...

It’s an invisible line that affects our daily modern lives “across the globe”. Today, we’re exploring the where and why behind 0° longitude, or the “Prime Meridian.” Latitude runs on an east-west line ...

So, what exactly does £77 million worth of work look like? The Observatory is a complex of historic buildings that have grown organically over more than three centuries. The result, while undeniably ...

Lines of longitude, also called meridians, are imaginary lines that divide the Earth. They run north to south from pole to pole, but they measure the distance east or west. Longitude is measured in ...

Alfredo has a PhD in Astrophysics and a Master's in Quantum Fields and Fundamental Forces from Imperial College London.View full profile Alfredo has a PhD in Astrophysics and a Master's in Quantum ...