English: In this animation, a neutron star (blue sphere) spins in the center of a colorful disk of gas, some of which follows the magnetic field (blue lines) and flows (blue-white arcs) onto the object’s surface. One interpretation of the quasiperiodic oscillations seen in X-rays in these systems is the formation of a hot spot (white oval) near the disk's inner edge, which expands and contracts as its properties change. Because of this irregular orbit, the hotspot emission varies within a range of frequencies.Credit: NASA's Goddard Space Flight Center Conceptual Image LabVisual description:At the center of a muticolor disk spins a blue sphere, a neutron star, surrounded by darker blue arcs representing its magnetic field. Cones of pale blue-white X-ray emission issue from the object's magnetic poles, wobbling regularly because they are not aligned with the its spin axis. Two pale arcs represent streams of gas flowing from the inner, bluish edge of the disk to the neutron star. The disk's inner edge shrinks and expands, carrying with it a bright white oval – an orbiting hot spot.