Hey Bill Nye! Is the Expansion of the Universe Gaining Speed?
Television Host and Science Educator
Edwin Hubble's discovery that the universe is expanding changed not only the way we think of the universe, but also how we understand the passage of time. Bill Nye the Science Guy explains how Hubble's finding created the foundation for other 20th century discoveries, e.g. that the universe is not only expanding, but expanding at an accelerating rate. The implication is that stars are moving apart from each other faster and faster, and that space itself is expanding. Where is it expanding into if there is no space already there? That's one of the mysteries of modern physics, says Nye.