Launched on 22 October 2001 and originally designed as a two-year mission, Proba-1 continues to provide valuable hyperspectral data to the scientific community, alongside priceless insight of long-lived missions—all while having travelled 4,329,416,712 kilometres to date.

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.

A view looking north to south of Egypt's famous Giza Pyramid Complex, as seen by ESA's Proba-1 minisatellite on 6 January 2018.

Originally designed as a two-year mission and launched on 22 October 2001, Proba-1 is still going strong, providing very valuable hyper-spectral data.

The blue of the Calanda reservoir amid the rugged landscape of northeastern Spain, as seen by ESA's oldest - and one of its smallest - Earth-observing missions, Proba-1, midway through its 15th year of operations.

The Proba-1 microsatellite (smaller than a cubic metre) is the first in ESA's series of satellites aimed at flight-testing new space technologies, designed for autonomous operations.

Proba-1 was launched on 22 October 2001 and is still going strong today, more than fifteen years later.