Books in Astronomy (sorted by popularity)
- Other Worlds Garrett Putman Serviss 112 downloads
- Watchers of the Sky Alfred Noyes 107 downloads
- Time and Tide: A Romance of the Moon Robert S. Ball 106 downloads
- Lectures on Stellar Statistics C. V. L. Charlier 102 downloads
- The gradual acceptance of the Copernican theory of the universe Dorothy Stimson 94 downloads
- Le Système Solaire se mouvant (French) August Tischner 93 downloads
- Half-hours with the Telescope Richard A. Proctor 89 downloads
- Side-Lights on Astronomy and Kindred Fields of Popular Science Simon Newcomb 73 downloads
- The Future of Astronomy Edward C. Pickering 72 downloads
- The Tides and Kindred Phenomena in the Solar System Sir George Howard Darwin 65 downloads
- Scientific Papers by Sir George Howard Darwin. Volume V. Supplementary Volume Sir George Howard Darwin 64 downloads
- Astronomical Instruments and Accessories William Gaertner and Company 60 downloads
- Publications of the Astronomical Society of the Pacific, Volume 1 Astronomical Society of the Pacific 28 downloads