ice

Under the Midnight Sun

Under the Midnight Sun

In September 2017, a new iceberg calved from Pine Island Glacier—one of the main outlets where the West Antarctic Ice Sheet flows into the ocean. Just weeks later, the berg named B-44 shattered into more than 20 fragments. On December 15, 2017, the Landsat 8 Earth-orbitng satellite took this image of the broken berg. An area of relatively warm water, known as a polyna, has kept the water ice free between the iceberg chunks and the glacier front. The polynya’s warm water could have caused the rapid breakup of B-44.

Ceres asteroid may have an ‘ice volcano’ and other signs of water, NASA mission reveals

Ceres asteroid may have an ‘ice volcano’ and other signs of water, NASA mission reveals

The arrival of NASA’s Dawn mission at the huge asteroid “1 Ceres” in early 2015 has turned out to have been well worth waiting for. This dwarf planet is the largest body in the asteroid belt between Mars and Jupiter and was the first to be discovered. But, until recently, we have only had information from ground and space-based telescopes, which have given us tantalising glimpses of a dark, possibly water-rich object.