NASA camera shows moon crossing Earth

A camera on the Deep Space Climate Observatory (DSCOVR) satellite shot an arresting view of the moon crossing in front of the Earth. The image clearly shows the moon's far side lit up by the sun -- though even in full sunlight, the Earth is far brighter.

"It is surprising how much brighter Earth is than the moon," DSCOVR project scientist Adam Szabo said in a news release. "Our planet is a truly brilliant object in dark space compared to the lunar surface."

DSCOVR, which is a partnership between NASA, the National Oceanic and Atmospheric Administration and the U.S. Air Force, is equipped with NASA's Earth Polychromatic Imaging Camera, a 4-megapixel CCD camera and telescope. It's orbiting between the Earth and the sun at a distance of 1 million miles.
Though the moon's so-called dark side isn't visible from Earth -- thanks to the "tidally locked" moon always presenting the same side to its terrestrial neighbour -- It's far from the first time we've seen it.

NASA photographed the moon crossing in front of the Earth in 2008, but the moon was only partially illuminated. Moreover, those images were taken from 31 million miles away.

DSCOVR's primary role is to monitor the solar wind for NOAA, which is "critical to the accuracy and lead time of space weather alerts and forecasts," says NASA.

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