News: ISS visibility from Cape Town posted on April 23, 2002 From April 28 until the beginning of May, the International Space Station will be visible at certain positions in the skies above Cape Town. Sightings must be done during twilight hours. The ISS is brightest when it is 'down sun' , in the portion of the sky opposite the set sun, so the the sunlit side of the Space Station is facing ground observers. Watch this space for details.