In 1924, Swedish astronomer Knut Lundmark,found the first observational evidence for universe expansion. The expansive forces of dark energy are generally thought to be uniform across the entire universe, pushing against all objects equally. Within our planet, solar system, and galaxy, the attractive force of gravity keeps things relatively bound and less subject to dark energy. “Dark energy is in crisis at the moment, because nothing really agrees, even though all of the science that has been done is incredibly rigorous,” says Webb. This next space telescope was specifically built to probe the mysteries of dark energy and universe expansion.