1. A method of laying out a dimple pattern on a golf ball comprising the steps of: a) constructing an icosahedron having 20 icosahedral triangles which is circumscribed by a sphere which has the diameter of the golf ball so that each apex of the icosahedron is intersected by the sphere, b) determining the point on an icosahedral triangle which is intersected by the lines which bisect each side of the icosahedral triangles, c) projecting said point onto the sphere to determine a geodesic focus point for the icosahedral triangle, d) connecting the geodesic focus point to each apex of the icosahedral triangle by a line segment so that the line segments and the sides of the icosahedral triangle form a right regular tetrahedron having a base formed by the icosahedral triangle and three triangular faces which merge at the geodesic focus point and which are in three different planes, e) repeating steps b through d for each of the icosahedral triangles to form a geodesically expanded icosahedron which has 60 of said triangular faces, f) laying out a substantially identical dimple pattern in each of said 60 triangular faces, and g) projecting the dimple pattern of said 60 triangular faces onto the sphere.