庞斯-布鲁克斯彗星的漩涡昏迷
(原标题: Comet Pons-Brooks' Swirling Coma)
2024-03-18
浏览次数: 12
下个月的日全食时，一颗明亮的彗星将会出现。这个非常不寻常的巧合发生是因为在4月8日的地球日全食期间，彗星12P/Pons-Brooks返回内太阳系时，碰巧离太阳只有25度。目前，这颗彗星仅处于肉眼可见的边缘，用双筒望远镜在傍晚的天空中向双鱼座方向看得最清楚。然而，即使是现在，彗星庞斯-布鲁克斯也在为深度相机图像做着相当大的表演。这张特色图片是由三种非常特殊的颜色合成而成的，淡蓝色显示了彗星不断变化的离子尾巴，绿色显示了它的外彗发，并突出了彗发周围的一些红色气体，呈螺旋状。这个螺旋被认为是由巨大的冰山彗星缓慢旋转的彗核排出的气体造成的。虽然预测彗星的未来亮度总是很困难，但彗星庞斯-布鲁克特别容易爆发，这使得预测它在4月8日月球在太阳前面运行时的实际亮度变得更加困难。日全食信息：2024日全食来自美国宇航局
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A bright comet will be visible during next month's total solar eclipse. This very unusual coincidence occurs because Comet 12P/Pons-Brooks's return to the inner Solar System places it by chance only 25 degrees away from the Sun during Earth's April 8 total solar eclipse. Currently the comet is just on the edge of visibility to the unaided eye, best visible with binoculars in the early evening sky toward the constellation of the Fish (Pisces). Comet Pons-Brooks, though, is putting on quite a show for deep camera images even now. The featured image is a composite of three very specific colors, showing the comet's ever-changing ion tail in light blue, its outer coma in green, and highlights some red-glowing gas around the coma in a spiral. The spiral is thought to be caused by gas being expelled by the slowly rotating nucleus of the giant iceberg comet. Although it is always difficult to predict the future brightness of comets, Comet Pons-Brook has been particularly prone to outbursts, making it even more difficult to predict how bright it will actually be as the Moon moves in front of the Sun on April 8. Total Eclipse Info: 2024 Total Solar Eclipse from NASA
© Jan Erik Vallestad