Theta = 2*arctan(d/D/2) d = 2*D*tan(Theta/2) Solar Range = 1.0118229 AU = 151366551 km Solar Diameter = 1392000 km Solar Angular Diameter = 2 * arctan(1392000/151366551/2) ISS Apogee = 347 km ISS Distance = 391 km Image Data: Solar Dia = 3593 px ISS boom = 95 px ISS panels = 46 px STS span = 26 px STS Length = 30 px Lengths: ISS boom = 2 * 391 * tan((95/3593) * arctan(1392000/151366551/2)) = 0.0950712944 ISS panels = 2 * 391 * tan((46/3593) * 2 * arctan(1392000/151366551/2)) = 0.0460345213 STS span = 2 * 391 * tan((26/3593) * 2 * arctan(1392000/151366551/2)) = 0.026019512 STS Length = 2 * 391 * tan((30/3593) * 2 * arctan(1392000/151366551/2)) = 0.0300225139 Wikipedia Data: ISS Width: 108.5 metres ISS Length: 73 metres STS Length: 37.24 metres STS Wingspan: 23.79 metres