- 			Astronomical Clock and Creation Stained Glass, in Dijon (France)On the occasion of the 800th anniversary of the Church of Notre-Dame de Dijon, the artist Senarius presents an imaginary astronomical clock associated with the rose window of Creation, visible on the rose of the north transept. 
- 			How to use a Sextant ? And what are the differences between a Sextant and an Astrolabe ?How to use a Sextant ? Simple explantation. And what are the differences between a Sextant and an Astrolabe ? 
- 			How to use an Astrolabe ?Using an Astrolabe in astronomy is not that complicated. Simple explanation ... 
 
				 
				