File:Historischer Sternprojektor »Cosmorama« der Firma ZEISS- Copyright- Stiftung Planetarium Berlin.jpg - Wikimedia Commons

File:Zeiss Planetarium Berlin.jpg - Wikimedia Commons

Planetariums - How it all began

Dezentral (part I), artspring festival, group show at Zeiss-Planetarium Berlin – Anne Wölk – Space Aesthetic and Science Fiction

Planetarium am Insulaner History

Planetarium history: Nazis persecuted inventor Rudolf Straubel of Zeiss.

Stiftung Planetarium Berlin

Planetariums - How it all began

Planetarium history

ZEISS Planetarium Installations

Planetariums - How it all began

Planetariums - How it all began