The cosmological principle implies that the metric of the universe must be of the form:formula_3where formula_4 is a three-dimensional metric that must be one of (a) flat space, (b) a sphere of constant positive curvature or (c) a hyperbolic space with constant negative curvature.
Leta 2004 so jezeru namerili površino 164 km2, v letu 2011 pa kar 350 km2.