Astronomers have discovered an extraordinary quadruple star system using NASA's exoplanet-hunting spacecraft TESS (Transiting Exoplanet Survey Satellite) called TIC 120362137, the tightest 3+1-star system yet discovered. The system consists of a stable and tightly bound inner system of three orbiting each other, while a distant outer star observing the system from afar. The discovery could help scientists better understand stellar formation and long-term orbital stability. The researchers also revealed that the outermost star has an orbital period of only around 1,046 days, which is the shortest among all the currently known triple stars by far. The scientists also determined the future of the system, which will end up as just two stellar remnants.