This was
your sky.
Large Eruptive Prominence Imaged by STEREO
Last week, our Sun produced one of the largest eruptive prominences ever seen. NASA's twin Sun-orbiting STEREO satellites captured this event in movie form. A quiescent solar prominence is a cloud of hot solar gas held above the Sun's surface by its magnetic field. These prominences can unpredictably erupt, expelling hot gas into the Solar System via a Coronal Mass Ejection.
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In tropical astrology, 18 APR 2010 falls under Aries (♈). The sign's window runs from 03-21 through 04-19. Aries is the constellation traditionally tied to spring's arrival in the northern hemisphere. The Sun was crossing this region of the sky on 18 APR 2010.