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The Star of Bethlehem

Ever since Jesus was born, people have been pondering on...

Our Galaxy – one of billions in the Universe –...

Nature is nothing if not rhythmic, and its rhythms are...

Why do astronomers do astronomy? It's often assumed that astronomy...

Time travel was once the stuff of fiction, but today...

A lecture on the Solar System’s most important inhabitant: our...

The story of Halley's Comet is one that will last...

Statistics was very much a fragmented activity in government for...

In 1781, William Herschel became the first man in history...

This lecture first of all describes the current environment scene...