Astronomy & Astrophysics Research Guide: Books & E-books

All PDF books published by the National Academies Press have been made available for free download, including astronomy, astrophysics and space science books such as "Effects of Solar Variability on Earth's Climate," "New Worlds, New Horizons in Astronomy and Astrophysics," & "Vision and Voyages for Planetary Science in the Decade 2013-2022."

The Library of Congress provides access to the Carl Sagan and Ann Druyan Archive in 3 sections: The Cosmos, Life on Other Worlds, and Carl Sagan and the Tradition of Science. Includes the American astronomer's handwritten journal, and an Articles/Essays tab with topics from Greek astronomy to Sagan's thinking process.