Hey look, it’s Earth! NASA unveils website posting daily images of our blue marble
The website, which will include a searchable archive of daily images, will feature photos taken with the Earth Polychromatic Imaging Camera (EPIC). The pictures will show Earth as it rotates, featuring the entirety of the planet over a one-day period.
EPIC, a four megapixel CCD camera and telescope, takes a series of 10 three-megabyte images with various narrowband filters, such as ultraviolet or near infrared, to compile images used by scientists who study Earth’s vegetation, ozone, and cloud cover, among other variables.
"The color Earth images are created by combining three separate single-color images to create a photographic-quality image equivalent to a 12-megapixel camera,"NASA said.
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EPIC has to take quick exposure images (20 to 100 milliseconds) to compensate for Earth’s brightness in the dark of space, according to NASA. The short exposure times do not allow EPIC to record fainter stars in the background.
The camera is affixed to the Deep Space Climate Observatory (DSCOVR), which is operated by NASA, in partnership with the National Oceanic and Atmospheric Administration (NOAA) and the US Air Force, to maintain solar wind monitoring for space weather alerts and forecasts.
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The website's images will be in the public domain, the agency said.
"NASA develops new ways to observe and study Earth's interconnected natural systems with long-term data records," NASA concluded. "The agency freely shares this unique knowledge and works with institutions around the world to gain new insights into how our planet is changing."