There are certain basic tips that all photographers learn when starting out — use a lens hood when shooting in bright sunlight, up your ISO or drop your shutter speed in dark situations, and so on — but there are some situations very few of us will ever get the chance to prepare for. Former captain of the space shuttle Discovery Alan Poindexter knows that more than most after undergoing NASA's photography training, and has taken to Luminous Landscape to share some of his pictures and shooting advice for those who find themselves in orbit. Come for the stunning photos shot with a Nikon D3s, stay for the tips about using reflected light from the Earth as a source of illumination. The rest of us will have to make do with the Canon 60Da for shooting space from the other side of the atmosphere.