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January 29, 2018

Black Marble: The Earth at Night

Screen Shot 2018-01-29 at 12.03.31 PM

From The Atlantic: "For three weeks spread out over April and October of 2012, the Suomi NPP satellite (jointly of NASA and NOAA) scanned all the Earth's land as it appeared at night. Scientists then mapped the satellite's data — 2.5 terabytes — over an earlier Blue Marble image, transforming that picture's daytime blues, browns, and greens into a night time palette of blues, blacks, and gold."

"The Suomi NPP's Visible Infrared Imaging Radiometer Suite can detect lights as faint as a lone highway lamp — meaning pretty much any human outcropping where electricity runs. 'Nothing tells us more about the spread of humans across the Earth than city lights,' says NOAA scientist Chris Elvidge. When you watch the video above (best in full screen), you can see at the horizon how daylight masks human development but, as the land falls dark, the signals of our settlements glow bright, giving us 'a global view of the human footprint on the Earth.'"

More at Space.com.

January 29, 2018 at 12:01 PM | Permalink


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