Using data from ESA’s CryoSat satellite, scientists can observe the changes in Arctic sea-ice thickness between October 2010 and March 2011. Every year, the Arctic Ocean during the winter months experiences the formation of vast amounts of floating ice, and melting during the summer months.
This artist’s impression shows how the solar wind shapes the magnetospheres of Venus (top), Earth (middle) and Mars (bottom). Earth has an internal magnetic field which makes its magnetosphere bigger (unlike Venus and Mars). The lines coming out of the Sun symbolise the outward propagation of the solar wind (planet’s distances are not shown to scale). Credits: ESA
New images from the Planck mission show previously undiscovered islands of star formation and a mysterious haze of microwave emissions in our Milky Way galaxy. The views give scientists new treasures to mine and take them closer to understanding the secrets of our galaxy. Image credit: ESA/Planck Collaboration
In celebration of the twenty-first anniversary of the Hubble Space Telescope’s deployment in April 2011, astronomers at the Space Telescope Science Institute pointed Hubble’s eye to an especially photogenic group of interacting galaxies called Arp 273.
Our Sun is more active now than it has been for the past four years. Increasingly, energetic particles and radiation are being ejected toward the Earth, posing significant hazards for our spaceborne and ground-based infrastructure. Next year will see the start of ESA’s precursor space weather warning services under the SSA Preparatory Programme. Credits: ESA