The future USS Zumwalt is so stealthy that it'll go to sea with reflective material that can be hoisted to make it more visible to other ships.
This image from Sentinel-1A's radar captures part of Germany's state of Bavaria, with the city of Munich on the right and Augsburg at the centre.
The Chinese city of Tianjin is captured in this Sentinel-1A radar image created by combining three scans over several months.
This radar image captures part of Catalonia in northeastern Spain including the city of Barcelona (right), the site of one of Europe's principal seaports.
This image from Sentinel-1A's radar on 11 July shows Tokyo Bay in Japan.
Guanabara Bay in southeast Brazil is pictured in this image from the Sentinel-1A satellite.
This image over the West Coast of the Netherlands is one of the early radar scans by the Sentinel-1A satellite, which was launched on 3 April.
This image from Envisat's radar shows the Zambezi River's floodplain in western Zambia.
This Envisat image was acquired over the Westfjords peninsula in northwest Iceland.
(PhysOrg.com) -- NASA and Japan released a significantly improved version of the most complete digital topographic map of Earth on Monday, produced with detailed measurements from NASA's Terra spacecraft.