形似埃菲尔铁塔的日珥

2022年2月16日

Eiffel Tower Prominence on the Sun
Video Credit & Copyright: Hawk Wolinski

Explanation: What’s that on the Sun? Although it may look like a flowing version of the Eiffel Tower, it is a solar prominence that is actually much bigger — about the height of Jupiter. The huge prominence emerged about ten days ago, hovered over the Sun’s surface for about two days, and then erupted — throwing a coronal mass ejection (CME) into the Solar System. The featured video, captured from the astrophotographer’s backyard in Hendersonville, Tennessee, USA, shows an hour time-lapse played both forwards and backwards. That CME did not impact the Earth, but our Sun had unleashed other recent CMEs that not only triggered Earthly auroras, but puffed out the Earth’s atmosphere enough to cause just-launched Starlink satellites to fall back. Activity on the Sun, including sunspots, prominences, CMEs and flares, continues to increase as the Sun evolves away from a deep minimum in its 11-year magnetic cycle.

Birthday Surprise: What picture did APOD feature on your birthday? (post 1995)

Tomorrow’s picture: open space

形似埃菲尔铁塔的日珥
影片提供与版权: Hawk Wolinski

说明: 太阳出现了什么？它或许看来很像流动版的埃菲尔铁塔，但它其实远更庞大，是一例伸展高度和木星直径相当的日珥。这个巨大的日珥大约10天前出现在太阳侧边，然后在悬浮于太阳表面上方约2天之后，发生爆发成为喷入太阳系的日冕物质抛射（CME）。这部摄于美国田纳西州亨德森维尔镇天文摄影者住家后院、原长为1小时的缩时主题影片，以往前及倒退的方式播放这例日珥。这个日冕物质抛射并未撞到地球，不过最近太阳释出的其他日冕物质抛射，不但触发了地球的极光活动，还使地球的大气大幅膨胀，造成数部刚发射升空的星链卫星掉回地球。随着太阳从11年周期的深邃极小期出来，包括太阳黑子、日珥、日冕物质抛射、与闪焰耀斑等太阳活动，都持续在增加之中。

生日惊喜: APOD在你生日那天拍了什么照片？（1995年后）

明日的图片: open space