新年的极光和SAR弧
(原标题: A New Year's Aurora and SAR Arc)
2025-01-07
浏览次数: 17
这是新的一年，天空是加倍的红。新的一年意味着地球在1月1日回到了它的轨道上的通常位置，这是它最接近太阳的前几天。在左边的两道红色天光中，第一道是红色极光，带有垂直光线，是由太阳的爆炸将带电粒子推入地球大气层造成的。第二道红光，在最右边最为明显，可能是由地球大气中带电粒子流形成的SAR弧线。虽然两者都呈现红色，但轻微的颜色差异可能是由于极光由氧和氮共同发射，而较高的SAR弧可能更纯粹地由大气中的氧发射。这张特色图片是1月1日在意大利的皮耶夫迪卡多雷附近拍摄的。传送门宇宙：随机APOD生成器
查看原文解释
It was a new year, and the sky was doubly red. The new year meant that the Earth had returned to its usual place in its orbit on January 1, a place a few days before its closest approach to the Sun. The first of the two red skyglows, on the left, was a red aurora, complete with vertical rays, caused by a blast from the Sun pushing charged particles into Earth's atmosphere. The second red glow, most prominent on the far right, was possibly a SAR arc caused by a river of charged particles flowing across Earth's atmosphere. Although both appear red, the slight color difference is likely due to the aurora being emitted by both oxygen and nitrogen, whereas the higher SAR arc was possibly emitted more purely by atmospheric oxygen. The featured image was taken on January 1 from near Pieve di Cadore in Italy. Portal Universe: Random APOD Generator
© Alessandra Masi