• January 26, 2006

    Episode 20: New Rings Around Uranus

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    Scientists have discovered additional rings around the planet Uranus. Uranus has been known to have a ring system since 1977, but recent Hubble observations show that its ring system is much bigger than thought. The newly discovered rings are very diffuse and twice the diameter of the planet's previously known rings. In addition to this "secondary" ring system, more satellites, or moons, were discovered orbiting Uranus. These satellites are near the rings, giving rise to speculation that dust from the moons could be the basis for the distant rings.