ESA ENVISAT Image: Icy waters of Ilulissat Fjord

This Envisat image, acquired on 21 July 2011, shows part of Greenland’s west coast – home to one of the fastest and most active glaciers in the world, Sermeq Kujalleq. 

At the centre of the image the glacier’s sea mouth is visible: the Ilulissat fjord, with icebergs bursting out from it and speckling the surrounding waters.

Credits: ESA

NASA: Blue Green Algae bloom Lake Atitln, Guatemala

A large bloom of cyanobacteria, more commonly known as blue-green algae, can be seen on Guatemala's Lake Atitln in this simulated-natural-colour image taken from space by NASA's Terra satellite

Picture: NASA / BARCROFT