Venture into another dimension and discover all about astronomy and the study of celestial objects, such as stars, comets, planets and asteroids. Plus, how you can be captivated by the wonders of the universe at the Peter Harrison Planetarium at Royal Observatory Greenwich. 

The Great Equatorial Telescope at the Royal Observatory kept Britain at the forefront of astrophysics and greatly expanded our knowledge of stars.

The story of Astronomer Royal George Biddell Airy and the remarkable Airy Transit Circle telescope he designed at the Royal Observatory Greenwich.

How the humble prism helped unlock the secrets of what the Universe is made of and where it is heading.

How and, more importantly, why do we measure the brightness of stars?

Handy tables of orbits, mass, rotation periods and tilts for the planets and their moons in the Solar System.

With a telescope we can see billons of miles and travel effortlessly back billions of years in time.

Why was Greenwich chosen as the home of the Prime Meridian and Greenwich Mean Time, and what do those terms mean?

Everything you need to know to start you on the road to becoming an amateur or professional astronomer.

What can you see through binoculars or a small telescope of the Solar System?

It is a star, is it a planet or is it a plane? A handy guide to identifying that bright object you saw last night.

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