Look up tonight and find the Moon. Now slide your gaze a little to its left and you’ll notice a bright, steady, golden point that refuses to twinkle. That is Jupiter, the largest planet in the solar system, and together the two are staging a slow‑motion lesson in orbital mechanics that you can watch with nothing more than your own eyes. Over several nights, the Moon glides past Jupiter and the twin stars of Gemini, changing its position night by night while Jupiter and the background stars barel