新斯科舍的北极光
Nova Scotia Northern Lights
Image Credit & Copyright: Jason Dain
Explanation: This almost otherworldly display of northern lights was captured in clear skies during the early hours of March 31 from 44 degrees north latitude, planet Earth. In a five second exposure the scene looks north from Martinique Beach Provincial Park in Nova Scotia, Canada. Stars of the W-shaped constellation Cassiopeia shine well above the horizon, through the red tint of the higher altitude auroral glow. Auroral activity was anticipated by skywatchers alerted to the possibility of stormy space weather by Sun-staring spacecraft. The predicted geomagnetic storm was sparked as a coronal mass ejection, launched from prolific solar active region 2975, impacted our fair planet’s magnetosphere.
Tomorrow’s picture: Why are we moving so fast?
新斯科舍的北极光
影像提供与版权: Jason Dain
说明: 这片看似隶属异星世界的极光，是在3月31日的清晨出现在地球北纬44度的清朗天空中。这幅5秒长曝光的影像，从加拿大新斯科舍省的马提尼克海滩省立公园纵目北大荒。影像里，透过泛红的高空极光，可见到高悬在地平线的上空的W形仙后座之恒星。由于观日卫星先前已发出可能出现太空天气风暴之警示，因此观星者预期会见到极光活动。这例地球磁暴预测，则是由多产的太阳活跃区2975所喷发的日冕物质抛射，冲撞我们美丽地球的磁层所触发的。
明日的图片: Why are we moving so fast?
