“Across the sea of space, the stars are other suns.” – Carl Sagan
“The reappearance of the crescent moon after the new moon; the return of the Sun after a total eclipse, the rising of the Sun in the morning after its troublesome absence at night were noted by people around the world; these phenomena spoke to our ancestors of the possibility of surviving death. Up there in the skies was also a metaphor of immortality.” – Carl Sagan, Cosmos
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1. Gutenberg.org
All formats – Dozens of free ebooks
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Gutenberg.org (All formats)
2. PhysicsDatabase.com
Various formats – 47 free ebooks
Click on the link below to view / download the ebook(s):-
PhysicsDatabase.com (Various formats)
3. FreeBookCentre.net
Various formats – Dozens of free ebooks
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FreeBookCentre.net (Various formats)
- Digitalbookindex.Org (Hundreds of free ebooks) (Various formats) [View / Download]
- DavidReneke.com (8 free ebooks) (PDF) [View / Download]
- E-Booksdirectory.com (17 free ebooks) (Various formats) [View / Download]
- Astronomy Essential by Jay Ryan (17 pages) (PDF) [View / Download]
- Moon and Astronomy (Various formats) [View / Download]
- Free Online Astronomy Courses (Video, iTunes Video) [View / Download]
- Manybooks.net (All formats) [View / Download]
- 1966 Yearbook of Astronomy by Patrick Moore (Various formats) [View / Download]
- Free Astronomy Ebooks & Apps (Various formats) [View / Download]
- Space-Based Astronomy: An Educator Guide with Activities for Science, Mathematics, and Technology Education by NASA (103 pages) (PDF) [View / Download]
- Discover the Cosmos of Hubble and Webb (2 free ebooks) (iBooks (iTunes), PDF) [View / Download]
- Challenges To Astronomy And Astrophysics by various authors (PDF, Kobo) [View / Download]
- Smashwords.com (9 free ebooks) (All formats) [View / Download]
- Radio Astronomy for Amateurs by Frank W. Hyde (All formats) [View / Download]
- Astronomy, Archaeology and Anthropology by University of Arizona Press (Various formats) [View / Download]
- Radio Astronomy (PDF and other various online resources) [View / Download]
- A Simple Guide to Backyard Astronomy Using Binoculars or a Small Telescope – Assembled by Carol Beigel (61 pages) (PDF) [View / Download]
