How the Universe Works

Tonight on Earth’s Cosmic Journey, the series’ eighth instalment titled “How the Universe Works” takes viewers on a quick spin around our planet. We see Earth’s tilt in action, the way the daily wobble creates seasons, and how the planet hurtles around the Sun at 30 kilometres per second. Astrophysicists and geologists explain the forces that keep the Earth on its path, from the Sun’s gravity to the pull of the Milky Way’s spiral arms. The programme also lifts the curtain on the invisible web of dark matter that threads galaxies together, showing how that scaffold guides the Solar System’s trek through the galaxy. Visuals of satellite data, time‑lapse footage of night‑sky constellations and crisp computer graphics make the science clear. If you’ve ever wondered why we have winter or how the Sun’s motion shapes our year, this episode lays it out in plain terms.