Very cool: NASA's Solar and Heliospheric Observatory captured this coronal mass ejection from the sun Monday, sweeping over the star cluster known as the Pleiades or Seven Sisters. (hat tip SpaceWeather.com) | Capital Weather Gang

Two Significant Solar Flares Imaged by NASA's SDO The Sun just emitted two significant solar flares on the morning of Sept. 6, 2017. The first peaked at 5:10 a.m. EDT and the second, larger flare, peaked at 8:02 a.m. NASA’s Solar Dynamics Observatory, run by NASA Sun Science, watches the Sun constantly and captured images of both events. Solar flares are powerful bursts of radiation. Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground,