original: Although they were officially designated to study just Jupiter and Saturn, the two probes were able to continue their mission into the outer solar system.
simplifications: Although they were only meant to study Jupiter and Saturn, the two probes were able to continue their mission into the outer solar system. Though they were formally assigned to study Jupiter and Saturn, the two probes continued their mission into the outer solar system. They were supposed to study just Jupiter and Saturn. But the two probes continued their mission into the outer solar system. Although they were designated to study Jupiter and Saturn, the probes continued their mission into outer space. They were officially designated to study just Jupiter and Saturn. The two probes were able to continue their mission into the outer solar system. Although they supposed to study just Jupiter and Saturn, the two probes continued their mission into the outer solar system. They were officially designated to study just Jupiter and Saturn. However, the two probes continued their mission into the outer solar system. Even though they were only supposed to study Jupiter and Saturn, the probes continued to their mission into Uranus and Neptune. The two probes were supposed to study Jupiter and Saturn but continued into the outer solar system. Although officially designated to study only Jupiter and Saturn, the two probes were able to continue their mission to the outer solar system.