彗星220P的爆发
(原标题: Comet 220P in Outburst)
2026-08-24
浏览次数: 1565
220P彗星异常明亮。通常情况下，220P/麦克诺特彗星非常暗淡，需要望远镜才能看到它。然而，今年的两次令人惊讶的爆发使它的亮度比平时高了大约2万倍，所以现在用双筒望远镜和长时间的相机曝光就可以看到它。正如预期的那样，220P彗星继续以超过5年的周期在火星和木星之间绕太阳运行。这张10天前在南非拍摄的长时间曝光照片显示了彗星亮绿色的头部和短的尘埃尾巴。彗星220P令人印象深刻的爆发的原因尚不清楚，但可能是由积聚的地下气体释放或彗星地震引起的。220P彗星将在10月份经过距离地球大约一个地球-太阳距离的地方，之后预计它将迅速消失，开始返回其轨道的远端。APOD的主要NASA网站正在迁移：从APOD . NASA .gov到science.nasa.gov/apod
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Comet 220P is unexpectedly bright. Normally, periodic Comet 220P/McNaught is so dim that to see it requires a telescope. Two surprising outbursts this year, however, have made it about 20,000 times brighter than usual, so that it is now visible with binoculars and long-duration camera exposures. As expected, Comet 220P continues to orbit the Sun between Mars and Jupiter with a period of over 5 years. The featured long duration exposure, taken 10 days ago from South Africa, shows the comet's bright green head and short dust tail. Reasons for Comet 220P's impressive outbursts are unknown but could be caused by the release of built-up subsurface gas or comet quakes. Comet 220P will pass about one Earth-Sun distance from the Earth in October, after which it is expected to fade quickly as it begins its return to the far part of its orbit. APOD's main NASA site is moving : From apod.nasa.gov to science.nasa.gov/apod
© Spilios Asimakopoulos