3-D images of HD 62623 obtained with the VLTI (left), compared to the model of a rotating disk (right). In the boxes, the gas kinematics is shown (3rd dimension): blue-colored gas approaches the observer, while red-colored gas recedes from the observer. The size of the inner gas disk of approximately 2 milli-arcseconds corresponds to 1.3 astronomical units (distance Earth-Sun), while the outer dust ring seen in the images has a radius corresponding to 4 astronomical units, assuming 2,100 light-years as distance to HD 62623. F. Millour et al.