Abstract: A solid surface reflector for being stowed in a constrained volume on a spacecraft comprises a central portion 10 with a series of peripheral elements 11 and 11' hingedly attached around the periphery thereof for folding movement about axes 14, 14' tangential to a circle centered on the center X of the reflector. Those elements referenced 11 have axes 14 spaced radially further from the center of the reflector than the axes 14' of elements 11' so that from a stowed condition with all the elements 11, 11' overlying central portion 10, firstly elements 11 may be unfolded and then elements 11' may be unfolded, without fouling, to define a rigid, generally smooth reflector surface wherein the gaps between adjacent elements are not significant.