This, the greatest Hindu festival of lights, can be seen from space. It lasts for five days and includes numerous firework displays. People light traditional deepa oil lamps and candles all around their homes to draw the attention of Lakshmi, the goddess of wealth and fortune. This ritual of lighting lamps is of great significance as darkness stands for ignorance while light represents knowledge and freedom from negative impulses and emotions such anger, envy, sanctimony and fear. More information is available at diwalifestival. org.