Astronomers have discovered a rare instance of a interstellar comet speeding through the solar system. The 3I/ATLAS was first ...

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

When Cassini first saw Iapetus, the moon looked like a tiny speck on the west side of Saturn. He calculated its orbit and thought he would be able to see it again on the east side of Saturn 39 ...

Neptune has 16 known moons, of which Triton is the largest. Interestingly it is the only large moon in our solar system with a retrograde orbit, which Triton orbits in the opposite direction of ...

THE WOODLANDS, TEXAS — The dark dunes of Titan, Saturn’s largest moon, could have fallen from space. More than enough cometary material may have struck Titan to have formed its vast dune ...

Their model estimates Chrysalis was roughly the size of Iapetus, Saturn's third-largest moon. Wisdom and his colleagues theorize that sometime between 100 million and 200 million years ago ...

Instead, there aren't that many impact craters on Mimas, the closest moon to Saturn, while there are many more craters on Iapetus, the furthest moon away from Saturn.

Since the moon's discovery by Giovanni Domenico Cassini in 1671, Iapetus' appearance has baffled astronomers. The leading edge of Iapetus, which faces the direction of its orbit, is black as ...

But one moon might be missing. According to a new study, Saturn once had yet another moon, about the same size as Iapetus, which is the third-largest satellite in Saturn’s collection.

Assuming it was similar in size to Iapetus (one of Saturn's larger moons), this orbit would be stable until the change in Titan's orbit brought the two moons into their own gravitational resonance.

Saturn’s axis is tilted by about 27 degrees with respect to the plane of its orbit, and that tilt slowly changes over time in a phenomenon called precession, like a spinning top wobbling on a table.