Space Print from NASA: Focal Plane Structure Hubble. The Hubble Space Telescope (HST) was designed see seven times further into space than had been possible before, without the distortion caused by the Earth's atmosphere. It is a reflecting telescope and its main mirror has a diameter of 2.5 metres (NASA Media Archives). Choose to buy this picture as an unframed print or poster, a framed print or a mounted box canvas print.