Zonnevlekken Possibly 1885 - 1886

"Zonnevlekken," meaning "sunspots" in Dutch, is a photographic print by Jules Cesar Janssen, a renowned astronomer. It was created sometime between 1885 and 1886. This image showcases a sunspot captured through a telescopic lens, demonstrating Janssen's innovative use of photography in astronomical research. The detailed texture of the sunspot, captured in intricate detail, highlights the granulation and striations of the solar surface. This groundbreaking photograph contributed significantly to the scientific understanding of the sun's activity and its impact on Earth's environment.