Astrolabus

papers & manuals
see above

hardware
see above

software
see above

keywords

Description

Specifications

Astrolobus (plural = Astrolabi)  were one of the first devices in the western world to calculate the length of the moon month. Astrolabi were used on land to determine seasons for sewing and other purposes.

But as well on sea for navigation purposes. One can see that for this purpose the instrument in rather inaccurate. However these were instruments of high precision for the time they were in use for practical purposes.
Now the real old ones serve as museum pieces. They are still manufactured and you can still buy an old astrolabus in most antique shops for not too much.

Chronology

.