Books in Astronomy (sorted by popularity)
- Are the Planets Inhabited? E. Walter Maunder 86 downloads
- Astronomical Instruments and Accessories William Gaertner and Company 70 downloads
- Other Worlds Garrett Putman Serviss 70 downloads
- Lectures on Stellar Statistics C. V. L. Charlier 63 downloads
- Sir William Herschel: His Life and Works Edward S. Holden 62 downloads
- Watchers of the Sky Alfred Noyes 62 downloads
- The Future of Astronomy Edward C. Pickering 61 downloads
- Half-hours with the Telescope Richard A. Proctor 61 downloads
- Side-Lights on Astronomy and Kindred Fields of Popular Science Simon Newcomb 47 downloads
- Le Système Solaire se mouvant (French) August Tischner 44 downloads
- The Tides and Kindred Phenomena in the Solar System Sir George Howard Darwin 41 downloads
- Scientific Papers by Sir George Howard Darwin. Volume V. Supplementary Volume Sir George Howard Darwin 26 downloads
- Publications of the Astronomical Society of the Pacific, Volume 1 Astronomical Society of the Pacific 21 downloads