Books in Astronomy (sorted by popularity)
- Recreations in Astronomy Henry White Warren 129 downloads
- Le Système Solaire se mouvant (French) August Tischner 126 downloads
- The Martyrs of Science, or, The lives of Galileo, Tycho Brahe, and Kepler David Brewster 117 downloads
- Astronomical Instruments and Accessories William Gaertner and Company 104 downloads
- Are the Planets Inhabited? E. Walter Maunder 100 downloads
- Other Worlds Garrett Putman Serviss 91 downloads
- Half-hours with the Telescope Richard A. Proctor 89 downloads
- The Future of Astronomy Edward C. Pickering 79 downloads
- Watchers of the Sky Alfred Noyes 78 downloads
- Side-Lights on Astronomy and Kindred Fields of Popular Science Simon Newcomb 69 downloads
- The Tides and Kindred Phenomena in the Solar System Sir George Howard Darwin 61 downloads
- Publications of the Astronomical Society of the Pacific, Volume 1 Astronomical Society of the Pacific 41 downloads
- Scientific Papers by Sir George Howard Darwin. Volume V. Supplementary Volume Sir George Howard Darwin 37 downloads