Lune Aqueduct Lune Aqueduct The Lune Aqueduct is a navigable aqueduct that carries the Lancaster Canal over the River Lune, on the east side of the city of Lancaster in Lancashire, England. It was completed in 1797 at a total cost of £48,320 18s 10d. It is a Grade I listed building. The aqueduct was designed by civil engineer John Rennie and constructed by architect Alexander Stevens (died 1796, aged 66). The cost of the construction was close to £50,000. The aqueduct is a traditional structure of that time, consisting of five stone arches supporting the stone trough. Within the piers, special
Spherical lune Spherical lune In spherical geometry, a spherical lune is an area on a sphere bounded by two half great circles which meet at antipodal points, and is an example of a digon, {2}, with dihedral angle θ. The word "lune" derives from "luna", the Latin word for Moon. A spherical wedge is the volume of space bounded by two planes passing through a sphere center and the surface of the sphere. Great circles are the largest possible circles (circumferences) of a sphere; each one divides the surface of the sphere into two equal halves. Two great circles always intersect at