One of Europe’s most high-profile science missions is slated to launch on a SpaceX Falcon 9 rocket this weekend, potentially giving scientists deeper insight into the mysteries of dark energy and dark matter.

Launch of the European Space Agency’s Euclid space telescope from Cape Canaveral Space Force Station in Florida, slated for 11:11 a.m. EDT Saturday, will pave the way for gathering data on dark energy and matter, both of which are believed to make up 95% of the universe. Scientists say they are responsible for the growth and development of the universe, too.