Mars; the centre of the scene shows the entire Valles Marineris canyon system. Image credit: NASA Goddard Space Flight Centre. - Data from two instruments aboard NASA’s Mars Reconnaissance Orbiter have led to the discovery of a rare acid-sulphate mineral deposit on Mars, providing the first mineralogical evidence that the planet once had glaciers.
Magnificent CME Erupts on the Sun - August 31 On August 31, 2012 a long filament of solar material that had been hovering in the sun's atmosphere, the corona, erupted out into space at 4:36 p.m. EDT. The coronal mass ejection, or CME, traveled at over 900 miles per second. The CME did not travel directly toward Earth, but did connect with Earth's magnetic environment, or magnetosphere, causing aurora to appear on the night of Monday, September 3.