Learn how Hubble is measuring the expansion rate of the Universe in this new explainer from NASA's Goddard Space Flight Center.br br Credit: NASA's Goddard Space Flight Center br Producer & Director: James Leighbr Editor: Lucy Lundbr Director of Photography: James Ballbr Additional Editing & Photography: Matthew Duncanbr Executive Producers: James Leigh & Matthew Duncanbr Production & Post: Origin Films br br Video Credit:br Hubble Space Telescope Animationbr Credit: M. Kornmesser (ESAHubble)br br Dark Energy Expansion Graphbr Credit: NASA's Goddard Space Flight Centerbr br Dark Energy Expansion Animation br Credit: NASA's Goddard Space Flight Center Conceptual Image Labbr br Hubble Extreme Deep Field Fly Throughbr Credit: NASA, ESA, and F. Summers, L. Frattare, T. Davis, Z. Levay, and G.