http://book.klll.cc/ebooks/subject/21623.opds?sort_order=downloads 2025-08-06T05:13:40Z Books about Astronomical photography (sorted by popularity) Free eBooks since 1971. Project Gutenberg https://book.klll.cc webmaster@gutenberg.org https://book.klll.cc/gutenberg/favicon.ico 25 1 2025-08-06T05:13:40Z https://book.klll.cc/ebooks/subject/21623.opds?sort_order=title Sort Alphabetically by Title 2025-08-06T05:13:40Z https://book.klll.cc/ebooks/subject/21623.opds?sort_order=release_date Sort by Release Date 2025-08-06T05:13:40Z https://book.klll.cc/ebooks/36470.opds Photographs of Nebulæ and Clusters, Made with the Crossley Reflector James Edward Keeler 2025-08-06T05:13:40Z https://book.klll.cc/ebooks/53542.opds On the Construction of a Silvered Glass Telescope Henry Draper