Werner E. Celnik

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Astronomy for Beginners An astronomy beginner has many questions – and here are the answers! The authors guide readers th...

20,00 €

Solar eclipse over Europe A total solar eclipse is probably the most spectacular celestial event one can experience. Finall...

10,00 €

Kosmos Mars Guide Mars is a highlight for skywatchers and the only planet where surface details can be observed. Th...

19,99 €