{"id":113213,"date":"2026-10-09T16:54:22","date_gmt":"2026-10-09T14:54:22","guid":{"rendered":"https:\/\/www.telescoop.nl\/?post_type=product&p=113213"},"modified":"2026-10-09T20:34:54","modified_gmt":"2026-10-09T18:34:54","slug":"universal-astrolabe-by-juan-de-rojas-replica-hemisphere","status":"publish","type":"product","link":"https:\/\/www.telescoop.nl\/en\/universeel-astrolabium-van-juan-de-rojas-replica-hemisferium\/","title":{"rendered":"Universal astrolabe by Juan de Rojas, replica | Hemisferium"},"content":{"rendered":"

If you are looking for a gift for someone who loves astronomy and history, the Astrolabium De Rojas is a piece with a story to tell. With an astrolabium, astronomers determined the position of the sun and the stars and calculated the time from them. A regular astrolabium required a separate plate per latitude. The Spanish astronomer Juan de Rojas used a projection that works at every latitude in the 16th century.<\/p>\n\n\n\n

Hemisferium makes replicas of historical scientific instruments. This astrolabe is therefore primarily a decorative and educational piece for the office or bookcase. Those who prefer to view the sky from outside have more use for it. a rotating star map for the Netherlands<\/a>.<\/p>\n\n\n\n

If you really want to work with it, then read the instructions first, because using an astrolabium takes some practice. In our astronomy knowledge center<\/a> find more background information about astronomy.<\/p>\n\n\n\n

An astrolabe from the German tradition is The astrolabe of Georg Hartmann<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

Replica of the astrolabe of Juan de Rojas from the 16th century, which works thanks to its projection at every latitude.<\/p>","protected":false},"featured_media":113211,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[3286],"product_cat":[3272],"product_tag":[],"class_list":["post-113213","product","type-product","status-publish","has-post-thumbnail","product_brand-hemisferium","product_cat-geschenken","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"bundled_by":[],"bundle_stock_status":"instock","bundle_stock_quantity":null,"bundle_virtual":false,"bundle_layout":"","bundle_add_to_cart_form_location":"","bundle_editable_in_cart":false,"bundle_sold_individually_context":"","bundle_item_grouping":"","bundle_min_size":"","bundle_max_size":"","bundle_price":[],"bundled_items":[],"bundle_sell_ids":[],"acf":[],"jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":113235,"url":"https:\/\/www.telescoop.nl\/en\/arabisch-astrolabium-replica-hemisferium\/","url_meta":{"origin":113213,"position":0},"title":"Arabic astrolabium, replica | Hemisferium","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"A replica of an Arabic astrolabe, after the instruments with which astronomers in the medieval Islamic world determined time and stars.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44753_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44753_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44753_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113217,"url":"https:\/\/www.telescoop.nl\/en\/zeevaartastrolabium-om-de-breedtegraad-te-bepalen-replica-hemisferium\/","url_meta":{"origin":113213,"position":1},"title":"Seamarine astrolabe to determine the latitude, replica | Hemisferium","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Replica of the astrolabe with which sailors measured the height of the sun or a star to determine the latitude at which they were sailing.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44747_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44747_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44747_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113232,"url":"https:\/\/www.telescoop.nl\/en\/modern-astrolabium-groot-hemisferium\/","url_meta":{"origin":113213,"position":2},"title":"Modern astrolabium, large | Hemisphere","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Large Astrolabium from Hemisferium, on which you can read the position of the sun and stars. The size is easy to read.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44752_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44752_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44752_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113258,"url":"https:\/\/www.telescoop.nl\/en\/astrolabium-van-hartmann-15-cm-hemisferium\/","url_meta":{"origin":113213,"position":3},"title":"Hartmann's astrolabe, 15 cm | Hemisferium","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Astrolabium of 15 cm to Georg Hartmann, the instrument maker from 16th-century Nuremberg, as a decorative and instructive replica.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/91062_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/91062_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/91062_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113229,"url":"https:\/\/www.telescoop.nl\/en\/modern-astrolabium-middelgroot-hemisferium\/","url_meta":{"origin":113213,"position":4},"title":"Modern astrolabium, medium size | Hemisphere","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Medium-sized astrolabe from the Hemisphere in modern design, to learn how to read the position of the sun and stars.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44751_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44751_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/44751_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":113239,"url":"https:\/\/www.telescoop.nl\/en\/kwadrant-van-beringer-replica-hemisferium\/","url_meta":{"origin":113213,"position":5},"title":"Beringer quadrant, replica | Hemisferium","author":"Info telescoop","date":"09-10-2026","format":false,"excerpt":"Replica of the quadrant of Beringer, a historical instrument in the form of a quarter circle to measure the height of celestial bodies.","rel":"","context":"Similar post","block_context":{"text":"Similar post","link":""},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/69617_1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/69617_1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.telescoop.nl\/wp-content\/uploads\/2026\/10\/69617_1.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product\/113213","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/comments?post=113213"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media\/113211"}],"wp:attachment":[{"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/media?parent=113213"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_brand?post=113213"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_cat?post=113213"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.telescoop.nl\/en\/wp-json\/wp\/v2\/product_tag?post=113213"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}