domingo, 24 de julio de 2016

IMAGES OF EARTH SEEN FROM ONE MILLION MILES




NASA's aptly named EPIC (Earth Polychromatic Imaging Camera) camera sits about one million miles from our planet, where it uses an array of sensors to monitor and provide observations of cloud heights, aerosols, vegetation growth, and the state of ozone in the atmosphere. It also provides some pretty neat images of Earth, which NASA has assembled into a year-long time-lapse.

EPIC sits aboard the DSCOVR (Deep Space Climate Observatory) satellite at Lagrange Point 1, a point at which the sun's gravity is essentially canceled out by the Earth's gravity. This allows it to remain in place essentially unassisted and also gives it a view of the Earth that is always illuminated, allowing scientists to collect imagery 24 hours a day. 

The camera uses a four-megapixel CCD sensor that records series of images taken through 10 different narrowband filters across the light spectrum, from which the red, blue, and green filters are used to create the natural color images you see above.