The second Copernicus Sentinel-3 satellite, Sentinel-3B, lifted off on a rocket from the Plesetsk Cosmodrome in northern Russia on April 25, 2018, joining its twin, Sentinel-3A, in orbit.

This first-light image of the southern coast of Cuba comes from the miniature HyperScout instrument aboard the European Space Agency (ESA) GomX-4B CubeSat.

Auroras are one of the many Earthly phenomena the crew of the space station observe from their perch high above the planet.

An astronaut aboard the International Space Station focused a high-resolution lens on the city of Medina (Madinah in official documents) in western Saudi Arabia.

An astronaut flying aboard the International Space Station took this long-lens photograph of part of Doha, the capital city of Qatar, located on the northeastern coast of the Arabian Peninsula.

Marking the International Day of Forests, this Copernicus Sentinel-2 false-color image shows an area of Bolivia that was once covered by trees but has now been cleared for resettlement and agriculture.

It has been a haven and sanctuary for pirates, smugglers and religious dissenters. The Romans may have set up camp on this rock, and Catholic Spaniards and British and Scottish soldiers built a castle and other military garrisons on it. Prisoners were sequestered here. But these days, the tiny islet is known for two things: seabirds and curling stones.

The organic and intricate features of a volcanic cave come alive in great detail in this three-dimensional image of La Cueva de Los Verdes in Lanzarote, Spain. Some of the most innovative scanning technologies have produced the largest 3D scan of a lava tube on Earth.

As sea ice at far northern latitudes approached its annual maximum extent, the Terra satellite captured this natural-color image of sea ice and clouds off Canada's Newfoundland and Labrador province.

The Copernicus Sentinel-1 mission captured this image over the Bering Strait, which connects the Pacific and Arctic Oceans between Russia and the U.S. state of Alaska.