On August 31, 2012 the Sun threw a major tantrum. It started with a vast arc of material towering over its surface, a stream of plasma flowing between two sunspots. Sometimes these collapse back down to the Sun’s surface, but this one exploded, blasting hundreds of millions of tons of material out into space. SDO captured this ridiculously awesome picture of the arc just before it erupted
Achromatic: Achromatic colors are neutrals, meaning that they contain no chroma or hue. An achromatic color scheme uses all achromatic or neutral colors: black and white, and a full value tonal range of grays.