To date there have been millions of viewers looking at the High Definition Earth Viewing, or HDEV camera views. Four cameras are sitting on the exterior of the space station which stream live video of Earth for viewing online. The cameras are enclosed in a temperature specific housing and are exposed to the harsh radiation of space. Analysis of the effect of space on the video quality may help engineers decide which cameras are the best types to use on future missions. The Associate Program Scientist for Crew Earth Observations, Will Stefanov, tells us more.