Detailing the history of what may be the oldest science, this program explores 13 of its crucial benchmarks: ancient awareness that the planets move; Copernican cosmology; Johannes Kepler’s laws of planetary motion; Galileo’s discovery of Jupiter’s moons; Edmund Halley’s comet prediction; William and Carolyn Herschel’s galactic mapping; Einstein’s General Theory of Relativity; Edwin Hubble’s proof that the universe is expanding; Karl Jansky’s discovery of galactic radio waves; Arno Penzias and Robert Wilson’s detection of the cosmic microwave background; observations of gamma ray bursts; the discovery of extrasolar planets; and the “big rip” theory. A Discovery Channel Production. (46 minutes)