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New global map of Earth at night

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This week (April 12, 2017), NASA scientists released the first new global map of Earth at night since 2012. The composite map – dubbed the Black Marble – depicts earthly lights at night as observed in 2016. This nighttime look at our home planet, created using satellite data, provides a unique perspective of human activities around the globe. NASA has prepared a lot of information for you about this map. You can:

Read a NASA Earth Observatory feature about improvements and applications for night lights data.

Download hemisphere views and animations from present and past Earth at Night projects.

Download the flat global map.

Browse the Earth at Night on Worldview.

Read an Earth Observatory feature about the study of nighttime lights.

Go to the main NASA Earth Observatory Night Lights page

According to a NASA statement:

The principal challenge in nighttime satellite imaging is accounting for the phases of the moon, which constantly varies the amount of light shining on Earth, though in predictable ways. Likewise, seasonal vegetation, clouds, aerosols, snow and ice cover, and even faint atmospheric emissions (such as airglow and auroras) change the way light is observed in different parts of the world.

The new maps were produced with data from all months of each year. The team wrote code that picked the clearest night views each month, ultimately combining moonlight-free and moonlight-corrected data.

Light from the aurora australis, or “southern lights,” is bright enough to reveal the ice edge in Antarctica’s Queen Maud Land. Image via NASA Earth Observatory and NOAA National Geophysical Data Center.

Bottom line: On April 12, 2017, NASA released the new “Black Marble,” the first new global nighttime satellite map of Earth since 2012.

Read more from NASA

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April 14, 2017

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