The first astronomer to discover moons around Jupiter was Galileo, back in the year 1610, but astronomers are still finding more and more moons around this gas giant.

Wipe the dust off your binoculars and extract the family telescope from the back of the closet: Saturn is about to put on its best and brightest show of the year — an act Jupiter will soon follow.

On Monday evening, Jupiter and Saturn appeared closer to each other in the sky than they have for hundreds of years in what has become known as the Great Conjunction.

At least, that's how it will look to someone craning their head aloft. On the winter solstice, the pair of gas giants will appear closer to each other in the night sky than they have in centuries.