{"version":"1.0","type":"link","title":"Planisphere - Newikis","description":"In astronomy, a planisphere is a projection of the celestial sphere onto a plane. Because of the projection, certain parts of the celestial sphere cannot be shown. Hipparchus discovered that it was possible to do a projection which keeps the angles intact.","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://upload.wikimedia.org/wikipedia/commons/9/97/Planisphere.jpg","thumbnail_width":1125,"thumbnail_height":1134}