(n) :
a semicircular projection from a building, especially the rounded east end of a church that contains the altar; the nearest and furthest points to the centre of gravitationalattraction for a body in orbit. More usually called an apsis
(n) :
a semicircular projection from a building, especially the rounded east end of a church that contains the altar; the nearest and furthest points to the centre of gravitationalattraction for a body in orbit. More usually called an apsis