Με μια μικρή έρευνα που έκανα πριν απο λίγες ημέρες εντόπισα και κατέβασα τα παρακάτω βιβλία σε ηλεκτρονική μορφή. 1. Ken Freeman and Geoff McNamara-In Search of Dark Matte Springer | 2006 | PDF | 164 pages | 6.31MB 2. Michael K. Gainer, "Real Astronomy with Small Telescopes: Step-by-Step Activities for Discovery" (Patrick Moore's Practical Astronomy Series) Springer | ISBN / ASIN: 1846284783 | 2006 | 224 pages | PDF | 3.4MB 3. Patrick Moore, «The Amateur Astronomer (Patrick Moore's Practical Astronomy)» Springer | ISBN: 1852338784 | 12 edition (October 11, 2005) | 293 pages | PDF | 8 Mb 4. «The Observer's Year: 366 Nights in the Universe (Patrick Moore's Practical Astronomy Series)» Patrick Moore | Springer | ISBN: 1852338849 | 2 edition (April 7, 2005) | 368 pages | PDF |6 Mb 5. Antony Cooke, «Visual Astronomy Under Dark Skies: A New Approach to Observing Deep Space» Springer | ISBN: 1852339012 | 1 edition (May 26, 2005) | 192 pages | PDF | 3.5 Mb 6. Astronomy - Galaxies and the Expanding Universe.pdf 7.6Μb 7. Calibrating the Cosmos - How Cosmology Explains Our Big Bang Universe - F. Levin (2007).pdf 2.5Mb 8. Lucent Library of Science and Technology - Black Holes 2004.pdf 4.5Mb 9. Lucent Library of Science and Technology - Comets and Asteroids 2004.pdf 6.5Mb 10. Philip's Astronomy Encyclopedia 2002.pdf 33Mb 11. Stellar Life Cycle in Giant Galactic Nebula NGC 3603.pdf 0.3Mb 12. Stellar Nursery in the Orion Nebula.pdf 1.6Mb 13. Textbook on Spherical Astronomy (Smart 6ed 1977).pdf 15Mb 14. The Complete Idiot's Guide to Astronomy, Second Edition.pdf 9.4Mb 15. The Evolution of the Universe.pdf 1.4Mb 16. The Formation of Stars and Solar Systems.pdf 0.7Mb 17. The Origin of the Elements.pdf 0.6Mb όποιος ενδιαφέρεται ας επικοινωνήσει