Tony Sadiku reportsWe are now just a week away from what astronomers are calling a rare conjunction of the two largest planets in our solar system: Jupiter and Saturn.Just after sunset on December 21, the two planets -- although still 400 million miles apart -- will appear to touch, illuminating the night sky just days before Christmas.“The term conjunction refers to anytime you have two celestial bodies which appear close,” said José Cotayo, education specialist at the Museum of Science and Industry in Tampa. “It’s often called the great conjunction when it happens with the two gas giants -- those being Jupiter and Saturn.”Great conjunctions are not that rare, occurring roughly every two decades based on the aligning orbits of the.