Very Long Baseline Interferometry (VLBI)

Very Long Baseline Interferometry (VLBI) is a technique used in astronomy to create extremely detailed images of distant celestial objects. It involves multiple radio telescopes spread across large distances—sometimes continents apart—that observe the same object simultaneously. The signals they receive are synchronized and combined using precise timing, effectively functioning as a single, giant telescope with a size equal to the distance between the telescopes. This results in incredibly high resolution images, allowing scientists to study objects like black holes or quasars with extraordinary detail, far beyond what a single telescope could achieve on its own.