Webb found a hidden giant planet by detecting its atmospheric chemistry through a bright debris disk. The young star was already known to host Beta Pictoris b, one of the earliest exoplanets captured through direct imaging, and Beta Pictoris c. The addition of Beta Pictoris d makes Beta Pictoris only the second known system with at least three imaged planets. They were using Webb’s NIRSpec (Near-Infrared Spectrograph) to examine the atmosphere of Beta Pictoris b when evidence of Beta Pictoris d appeared. Atmospheric fingerprints expand the searchThe finding does more than add another planet to the Beta Pictoris system. Those measurements should provide a more complete picture of one of the best-known young planetary systems in astronomy.