Editing Celestial globe (section)

=== 17th century ===
[[File:Jahangir_-_Abu_al-Hasan.jpeg|thumb|upright|right|A detailed portrait of the [[Mughal Emperor]] [[Jahangir]] holding a celestial globe by [[Abu'l-Hasan (artist)|Abul Hasan]] (dated 1617 AD)<ref>{{cite web |date=March 2010 |title=National Portrait Gallery claims "Lost" Emperor Portrait is Largest Mughal Painting Ever Seen |url=http://www.artknowledgenews.com/2010-03-10-23-00-01-national-portrait-gallery-claims-lost-emperor-portrait-is-largest-mughal-painting-ever-seen.html |url-status=dead |archive-url=https://web.archive.org/web/20120605105040/http://www.artknowledgenews.com/2010-03-10-23-00-01-national-portrait-gallery-claims-lost-emperor-portrait-is-largest-mughal-painting-ever-seen.html |archive-date=5 June 2012 |website=ArtKnowledgeNews.com}}</ref><ref>{{cite news |date=7 April 2011 |title=Jahangir portrait sold for Rs. 10 crore at London auction |url=http://www.thehindu.com/news/article1606093.ece |url-status=dead |archive-url=https://web.archive.org/web/20110410223855/http://www.thehindu.com/news/article1606093.ece |archive-date=10 April 2011 |work=The Hindu |agency=[[Press Trust of India|PTI]]}}</ref>]]

A 17th-century celestial globe was made by Diya' ad-din Muhammad in [[Lahore]], 1668 (now in Pakistan).<ref>{{Cite web|title=Celestial globe|url=https://www.nms.ac.uk/explore-our-collections/collection-search-results/|access-date=2020-10-15|website=National Museums Scotland|language=en}}</ref> It is now housed at the [[National Museum of Scotland]]. It is encircled by a meridian ring and a horizon ring.{{sfn|Savage-Smith|1985|page=67}} The latitude angle of 32° indicates that the globe was made in the Lahore workshop.{{sfn|Savage-Smith|1985|page=69}} This specific "workshop claims 21 signed globes—the largest number from a single shop" making this globe a good example of celestial globe production at its peak.{{sfn|Savage-Smith|1985|page=43}} The globe itself has been manufactured in one piece, so as to be seamless.

There are grooves which encircle the surface of the globe that create 12 sections of 30° which pass through the ecliptic poles. While they are no longer used in astronomy today, they are called "ecliptic latitude circles" and help astronomers of the Arabic and Greek worlds find the co-ordinates of a particular star.{{sfn|Savage-Smith|1985|page=61}} Each of the 12 sections corresponds to a house in the [[zodiac]].