Heliograph
Science Photo Library
Spectra Of The Sun And Stars
David Parker/science Photo Library
The Wilna Photo-heliograph
Sheila Terry
Henry Mance
Science Photo Library
Photoheliograph For 1874 Transit Of Venus #1
Royal Astronomical Society/science Photo Library
The Sun In 1892
David Parker/science Photo Library
19th Century Sunspot Illustration
David Parker/science Photo Library
British Heliographer
Collection Abecasis/science Photo Library
Niepce De Saint Victor
Sheila Terry
Total Solar Eclipse #10
Royal Astronomical Society/science Photo Library
Photoheliograph For 1874 Transit Of Venus
Royal Astronomical Society/science Photo Library
Niepce De Saint Victor
Collection Abecasis/science Photo Library