Astronomy

Astronomy: The Science of the Heavenly Bodies

Curiosities of the Sky

Half-Hours with the Stars

Astronomical Discovery

The World of Flying Saucers: A Scientific Examination of a Major Myth of the Space Age

Mars and Its Canals

Astronomy and General Physics Considered with Reference to Natural Theology

Conversations on the Plurality of Worlds

Celestial Beings

Lectures on Stellar Statistics

The Evolution of Worlds

Moon Cycles