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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 –...

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

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

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

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

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