apr 272013
 
Bursts of Star Formation can Reduce Future Galaxy Growth

  Astronomers using the NASA/ESA Hubble Space Telescope have shown for the first time that bursts of star formation have a major impact far beyond the boundaries of their host galaxy. These energetic events can affect galactic gas at distances of up to twenty times greater than the visible size of the galaxy – altering [continue reading]

sep 152012
 
Mystery Spheres on Mars (With Video)

  NASA’s long-lived rover Opportunity has returned an image of the Martian surface that is puzzling researchers. Spherical objects concentrated at an outcrop called Kirkwood on the western rim of Endeavour Crater differ in several ways from iron-rich spherules nicknamed “blueberries” the rover found at its landing site in early 2004. Using its Microscopic Imager, Opportunity [continue reading]

jun 262012
 
Why Jet Streams Cross-Cut Saturn

  Turbulent jet streams, regions where winds blow faster than in other places, churn east and west across Saturn. Scientists have been trying to understand for years the mechanism that drives these wavy structures in Saturn’s atmosphere and the source from which the jets derive their energy. A particularly strong jet stream churns through Saturn’s [continue reading]

jun 072012
 
Climate Changes on Mars?

  The High Resolution Stereo Camera (HRSC) recently acquired images of two adjacent craters with very different characteristics in the Arabia Terra region on Mars. The Danielson Crater (with a diameter of approximately 60 km) is characterised by a variety of features referred to as ‘Yardangs’, while the smaller Kalocsa Crater (with a diameter of [continue reading]