A Sunspot visible without telescope
Behemoth sunspot 1302 unleashed strong flare on Saturday morning--an X1.9-category blast . NASA's Solar Dynamics Observatory (SDO) recorded the extreme ultraviolet flash.
Since the X1.9-flare, active region (AR) 1302 has unleashed M8.6 and M7.4 flares on Sept. 24 and an M8.8 flare early on Sept. 25. None of the blasts have been squarely Earth-directed, but this could change as the sunspot turns toward our planet in the days ahead. AR1302 is growing and shows no immediate signs of quieting down.
Measuring more than 150,000 km from end to end, the sprawling active region is visible even without a solar telescope.
published by Dailycosmicnews