Watch: Planets align for extraordinary 'Christmas star' solstice spectacle

Saturn and Jupiter will come the closest they have done in hundreds of years, creating what the researcher described as a "spectacular event in the sky" tonight - which also happens to be the winter solstice. Picture: International Dark Sky Associati/PA Wire

Tonight marks a spectacular event - an event in our solar system so rare that it can take decades to get a good view.

Jupiter and Saturn will appear closer to each other than they have done in hundreds of years, which also happens to be the winter solstice.