De Sitter, unlike Einstein, maintained that relativity actually implied that the universe was expanding, theoretical results which were later verified observationally and accepted by Einstein .
Mula pasahero, hindi katulad Einstein, pinapanatili na kapamanggitan aktwal na ipinahiwatig na ang daigdig ay pagpapalawak, panteorya mga resulta na kung saan mamaya ay napatunayan na observationally at tinanggap sa pamamagitan ng Einstein.