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Comet Encke: A Solar Windsock Observed by NASA’s STEREO

Much like the flapping of a windsock displays the quick changes in wind’s speed and direction, called turbulence, comet tails can be used as probes of the solar wind – the constant flowing stream of material that leaves the sun in all directions. According to

NASA’s SDO catches a double eclipse

NASA’s Solar Dynamics Observatory sees dozens of Earth eclipses and several lunar transits each year. On September 13, 2015, it saw the two happening at once. This past Sunday (September 13, 2015) was a partial eclipse of the sun as seen from parts of South