Throughout the winter, from dusk until 2:00 a.m. the MIT Museum presents Luminous Windows: Holograms for the 21st Century, an exhibition of contemporary, 3-dimensional holographic artworks displayed in the windows viewable only from outside the Mark Epstein Innovation Gallery, on the street and sidewalks of Massachusetts Avenue. Featured will be works by six international artists—Betsy Connors, an alumna and former lecturer of the Media Labs’ Spatial Imaging group*— whose varied imagery represents artistic and technical advancements in the field of display holography.