이 애니메이션은 지구의 EPIC(Polychromatic Imaging Camera)와 DSCOVR 우주선의 망원경과 백만 마일 떨어진 지구 사이를 가로지르는 태양에 의해 조명된 달 뒷면의 실제 위성 이미지를 보여줍니다. 크레딧: NASA/NOAA
가짜처럼 보이지만 지구를 도는 달의 이 바이러스 스냅샷은 실제로 실제입니다. 그러나 이번 주에 다시 한 번 라운드를 진행하는 것은 새로운 것이 아닙니다. 벌써 6년이 넘었습니다.
2015년으로 돌아가서,[{” attribute=””>NASA camera aboard the Deep Space Climate Observatory (DSCOVR) captured this unique series of images displaying the ‘dark side’ of the moon. The ‘dark side’ of the moon is often used to refer to the hemisphere of the moon that is facing away from Earth. However, it is more properly called the ‘far side’ as it is exposed to an equal amount of sunlight as the side facing Earth. We can never view the ‘far side’ from Earth due to a phenomenon called tidal locking, which occurs when an astronomical body takes the same amount of time to complete a full rotation around its axis and fully orbit around its partner.
Although DSCOVR’s primary purpose is to monitor solar winds for the National Oceanic and Atmospheric Administration (NOAA), the satellite also houses NASA’s Earth Polychromatic Imaging Camera (EPIC) which captured these images. This four-megapixel CCD camera and telescope maintains a constant view of Earth as it orbits and takes 13-22 images every day.
In order to capture Earth’s ‘natural color’, NASA combines three different monochrome exposures taken 30 seconds apart. The final combined image has a slight green offset to the right of the moon and thin blue and red offsets to the left of it which is due to the Moon’s movement between each exposure.
If you wish to view more images taken by EPIC, NASA publishes daily color images of different views of the Earth as it rotates throughout the day.
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