Visible in the early-morning sky today, Saturn’s two-toned moon Iapetus reaches superior conjunction just 1.4′ due south of Saturn. The proximity makes the now-11th-magnitude moon easier to find, as ...

Journey 1.5 billion kilometres to Saturn's most bewildering moon: Iapetus. This world of stark contrasts features a divided ...

Over the last few years, the term "Goldilocks zone" has come to be widely used to describe the range of distances from a star ...

Over the last few years, the term “Goldilocks Zone” has become widely used to describe the range of distances from a star ...

Saturn’s two-faced moon Iapetus reaches its greatest western elongation today. At western elongation, the moon’s lighter hemisphere is turned toward Earth, making it brightest and easiest to ...

Iapetus, a moon of Saturn, has baffled astronomers since the early days of telescopic observation. It seemed to vanish and reappear without explanation, earning it a mythical status in early ...

Saturn has tidally locked Iapetus. The moon is named Iapetus after the Greek god Iapetus, who is a son of Uranus and Gaia, a brother to Kronus, and the father of Atlas and Prometheus.

On October 25, 1671, Giovanni Domenico Cassini, an Italian astronomer, mathematician, astrologer and engineer, discovered Iapetus (pronounced eye-app-eh-tuss), one of Saturn’s many moons. He ...

Saturn’s third-largest and walnut-shaped moon, Iapetus, was discovered by Giovanni Cassini on October 25, 1671, but was observed as a dot whose brightness varied as it orbited the ringed planet. Its ...

After having no superior tools to our naked eyes to explore the universe, the 17th century ushered in a revolution with the adoption of the telescope. With larger apertures and the power to gather ...