A spacecraft including control vanes for controlling the pointing
direction of the spacecraft by providing a variable absorptive,
reflective, emissive and/or transmissive properties. The control vanes
provide a torque on the spacecraft to maintain the spacecraft pointing
towards the sun. The control vanes can include at least one x.sub.b-axis
control vane and at least one y.sub.b-axis control vane where the x.sub.b
axis control vane provides x.sub.b-axis control torque on the spacecraft
rotated about the x.sub.b-axis, and the y.sub.b-axis control vane
provides y.sub.b-axis control torque on the spacecraft when rotated about
the y.sub.b-axis.