Triangulated structure

Here you can plainly see the structure of one of Lhermitte's constellations. After trying various approaches -- lighted balloons tied to rooftops, kites, parachutes, lasers -- he settled on triangulated structures "made of clear 0.6mm nylon line, 0.2mm polyethylene braid, 0.75mm fiber optic, and a solar powered LED," according to Lhermitte's Web site. "During the day, the battery is recharged by the solar panel, and the circuit switches on the LED when it is dark enough to observe stars."