The Expanding Universe

The discovery that the universe is expanding was one of the most significant revelations in modern astrophysics. Tyson discusses how Edwin Hubble’s observations of distant galaxies showed that they are moving away from us, indicating that the universe itself is growing. This expansion supports the Big Bang theory and has profound implications for the ultimate fate of the universe. Tyson explains how ongoing research seeks to understand the rate of expansion and the influence of dark energy.