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APOD
Astronomy Picture of the Day
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
Earth at Night
Explanation: Can you find your favorite country or city ? Surprisingly, on this world-wide nightscape, city lights make this task quite possible. Human-made lights highlight particularly developed or populated areas of the Earth's surface, including the seaboards of Europe , the eastern United States , and Japan . Many large cities are located near rivers or oceans so that they can exchange goods cheaply by boat. Particularly dark areas include the central parts of South America , Africa , Asia , and Australia . The featured composite was created from images that were collected during cloud-free periods in April and October 2012 by the Suomi-NPP satellite , from a polar orbit about 824 kilometers above the surface, using its Visible Infrared Imaging Radiometer Suite (VIIRS).
| Date | July 9, 2017 |
|---|---|
| Credit |
Image Credit : NASA , NOAA NGDC , Suomi-NPP , Earth Observatory , Data and Processing: Chris Elvidge and Robert Simmon |
| Authors & editors: | Robert Nemiroff (MTU) & Jerry Bonnell (UMCP) |
| A service of: |
ASD at NASA / GSFC, NASA Science Activation & Michigan Tech. U. |