- This small and insignificant constellation in the southern hemisphere, representing an engraver’s chisel, is one of the inventions of the 18th-century French astronomer Nicolas Louis de Lacaille. He introduced it on his map of the southern stars published in 1756, where he gave it the French name les Burins (although in the accompanying star catalogue it was listed as Burin, singular). On the second edition of the map in 1763 this was Latinized to Caelum Scalptorium. In 1844 the English astronomer John Herschel proposed shortening the name to Caelum. Francis Baily adopted this suggestion in his British Association Catalogue of 1845, and it has been known as Caelum ever since.
- Western Sahara (Wikipedia)
Western Sahara is a disputed territory in North-western Africa. It has a surface area of 272,000 square kilometres (105,000 sq mi). Approximately 30% of the territory (82,500 km2 (31,900 sq mi)) is controlled by the Sahrawi Arab Democratic Republic (SADR); the remaining 70% is occupied and administered by neighboring Morocco. It is the most sparsely-populated country in Africa and the second most sparsely-populated country in the world, mainly consisting of desert flatlands. The population is estimated at 618,600, of which nearly 40% live in Morocco-controlled Laayoune, the largest city in Western Sahara.