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A cloud-specked view of the US territory of Guam in the western Pacific Ocean, as seen by ESA's Proba-1 microsatellite, which is still observing Earth despite being launched 16 years ago.

The cubic-metre Proba-1 was the first in ESA's series of satellites aimed at flight-testing new space technologies. It was launched on 22 October 2001 but is still going strong as the Agency's longest-serving Earth-observing mission.

Proba-1 view of Guam
Proba-1 view of Guam. Copyright: ESA

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