A new study implies that in the past, moons in our solar system may have had rings just like planets do — deepening the mystery of why no ringed moons exist today.

the planet really is less than half as bright as it can be at other times. Rest assured, Saturn’s magnificent rings are still there! There are two reasons they’re virtually invisible ...

It is not often that all the planets in the Solar System other than ours are lined up across the night sky for us to see.

you're going to see where Venus and Saturn are next to each other, slowly changing as they drift apart. And, and as you watch, you can actually see these slight changes in all the planet's positions." ...