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NASA's Mars orbiter captures stunning view of Earth and Moon

The images were taken from about 205 million kilometers from Earth.

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Earth and Moon seen from Mars
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The most powerful telescope aboard NASA's Mars orbiter has captured a stunning view of Earth and the Moon, showing continent-size detail on the planet and the relative size of its natural satellite.

The image combines two separate exposures taken on November 20 last year by the High-Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter.

The images were taken to calibrate HiRISE data since the reflectance of the moon's Earth-facing side is well known.

For presentation, the exposures were processed separately to optimise detail visible on both Earth and the moon.

The moon is much darker than Earth and would barely be visible if shown at the same brightness scale as Earth.

The combined view retains the correct positions and sizes of the two bodies relative to each other. The distance between Earth and the moon is about 30 times the diameter of Earth.

Earth and the moon appear closer than they actually are in the image as the observation was planned for a time at which the moon was almost directly behind Earth, from Mars' point of view, to see the Earth-facing side of the moon.

In the image, a reddish feature seen near the middle of the face of Earth is Australia.

When the component images were taken, Mars was about 205 million kilometers from Earth.

With HiRISE and five other instruments, the Mars Reconnaissance Orbiter has been investigating Mars since 2006.

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