- MINTAKA (Delta Orionis). Orion is defined by his great belt, three bright second magnitude stars in a row that the ancient Arabs called “the string of pearls,” which is the meaning of the name of the middle star, Alnilam. The two flanking stars, eastern Alnitak and western Mintaka, both come from Arabic phrases that mean “the belt of the Central One,” the Central One the Arabic personification of our Orion, a woman lost to history.
- Drainage basin (Wikipedia)
A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the drainage divide, made up of a succession of elevated features, such as ridges and hills. A basin may consist of smaller basins that merge at river confluences, forming a hierarchical pattern.