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- 1Mars - The Red PlanetJanuary 20, 1991
- 2The Fastest Clocks In The UniverseFebruary 17, 1991
- 3Jupiter And FamilyMarch 10, 1991
- 4Bombardment From SpaceMarch 31, 1991
- 5Wanderers In SpaceApril 28, 1991
- 6Guarding Their SecretsMay 26, 1991
- 7Saturn - The Ringed PlanetJune 30, 1991
- 8Soviet Space AstronomyJuly 28, 1991
- 9The Pole StarAugust 25, 1991
- 10A Galaxy In Creation?September 22, 1991
- 11Hubble - A New View Of The Universe?October 20, 1991
- 12Nothing But Blue Skies?November 17, 1991
- 13The Strangest PlanetDecember 8, 1991