Chazon Shomayim by Harav Eitan Tzakoni Shlita
1. The Mitzvah of "Hachodesh Hazeh Lachem".
2. The calculation of periods and the zodiac.
3. The solar and lunar course.
4. The calculation of spotting the new moon.
5. The commentary of the Rambam in his work "Hilchos Kiddush Hachodesh".
6. Colorful images and original sketches.
7. Mathematical proofs.
8. The Zmanim of the Molad.
9. Solar and lunar eclipses.
10. Theoretical introduction.
This book is recommended to those who really want to understand the Rambam in his work "Hilchos Kiddush Hachodesh". The price: 40 NIS, shipping and handling not included.
Techunot Shomayim by Harav Rafael Halevi of Hanover ZT"L
A book by Harav Rafael Halevi of Hanover ZT"L on calculating the new month. The book is organized by chapters and is written in clear and simple words while being decorated with dozens of precise drawings. This book was written about 250 years ago and has now been published by Harav Eitan Tzikoni Shlita in a sophisticated and repaired edition that includes enhanced images and new tables. This book is an essential for anyone interested in astronomy according to the Rambam Z"L. The book "Chazon Shomayim" is based on this book.
The price: 40 NIS.