  Weyl further points out that de Sitter showed that Einstein’s  cosmological equations of gravity have “a very simple regular  solution” and that an empty spacetime, namely, “a  metrically homogeneous spacetime of non-vanishing curvature,”  is compatible with these equations after all. Weyl says that de  Sitter’s solution, which on the whole is not static, forces us to  abandon our predilection for a static universe. 