Latitude is measured by your position north or south of the equator but what about longitude? How is your east or west position defined? Discover all about the quest to establish longitude and why it was important, the men behind its discovery, and the establishment of the Prime Meridian at Greenwich.

How did ships know where they were before seamen could get an accurate reading of their east/west location?

Find out what longitude is and what makes it so hard to measure.

The Astronomer Royal is the best-known and most prestigious post in astronomy with illustrious forebears such as Halley.

Edmond Halley set out to sea to use magnetism as a possible solution to the problem of determining longitude.

Neither the smallest nor the largest objects in the known Universe escaped the brilliant Hooke’s attention.

The Royal Observatory Greenwich is famous world-wide as the home of Greenwich Mean Time (GMT). But what is GMT and why is it so important?

Polite society was thrilling to the idea of an undiscovered continent in the south. Was it even there and what would count as proof if it didn’t exist?

Despite trailblazers like Captain Cook, the new techniques for navigation were slow to catch on.

From the satirical to the serious, the quest for longitude provoked a wealth of responses, some more worthy of attention than others.

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