Jupiter and Saturn will come close enough to form first ‘double planet’ visible in nearly 800 years

In the complex dance of the cosmos, two celestial bodies are about to partner up.

Jupiter and Saturn often look far apart — two separate specks puncturing different parts of the night sky. But later this month, the two largest planets in the solar system will come so close to each other that they may appear to be overlapping, according to NASA, creating a kind of “double planet” that has not been visible since the Middle Ages.