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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The NASA scientists have brought up evidence showing that the planet Earth never sleeps. Armed with an unprecedented view of Earth at night which shows the glow of natural and human-built phenomena in greater detail than ever before, the scientific researchers have revealed that the study of the planet Earth during the day is as important as the study of planet Earth during the night. The NASA team has taken new image of planet Earth with their Nasa-NOAA satellite which they have launched in 2011. Notably, the last picture of the Earth floating during the night was taken almost 40 years back when the Apollo 17 crew snapped the blue marble image of Earth. The NASA-National Oceanic and Atmospheric Administration satellite has indeed pinpointed the night lights of Earth in consecutive detail. Basically, the sensor itself has the possibility to captivate the equivalent of three low-light images simultaneously. In addition to this, the NASA researchers have demonstrated that the new sensor which has as name - VIIRS or the Visible Infrared Imaging Radiometer Suite is extremely sensitive. The VIIRS could even pick up the light of a single ship in the middle of the ocean...
