ב"ה

# 3D Diagrams on Rambam Kiddush haChodesh, Lesson 1

Autoplay Next

## Kiddush haChodesh, Lesson 1: Introduction

 Related Text: Kiddush HaChodesh - Chapter Eleven Topics:

## Join the Discussion

David Smirnoff March 29, 2023

What is this software called ? Reply

Ricardo Telichevesky Porto Alegre, Brazil November 20, 2022

Of course the calculations of Rambam are a lot more difficult due to the model that puts the Earth at the center, instead of the Sun. No one can blame the brilliant Rabbi though, because these facts only became known a few centuries after his death, and in those days even suggesting such a thing could be a death sentence as in Giordano Bruno's case (well he said other things that were frowned upon in those days too). I don't want to start a fight here about this - obviously one can use any reference point - either Earth at the center, or the Sun at the Center - if you really want to make things difficult for yourself you can put the Moon at the Center too. Just think about it GPS is very widely used and puts the Earth at the center because it makes things easier. I was just curious if anyone tried to redo his magnificent work using this 'new' information - obviously would achieve exactly the same results without that much pain - in that case, would you have a reference? Thanks Reply

Dan A October 29, 2023
in response to Ricardo Telichevesky:

The Rambam wrote with Ruach Hakodesh. There was no mistake Reply

Ricardo Telichevesky Miami, FL October 29, 2023
in response to Dan A:

I didn't say it was a mistake. I said there is an easier way of doing the calculation. If done right, should achieve the very same results as the Rambam, of course. Reply

Rafi Rosenberg Skylake, FL July 22, 2022

This is absolutely amazing!!! You are a great teacher and the animated illustration is so helpful! Thanks for your efforts! Reply

Levi Y Rapoport Syracuse April 4, 2018

Correction @ 5:13 mark: Each constellation contains 30 degrees (not 60). Reply