2025年2月15日
Parhelia at Abisko
Image Credit & Copyright: Felipe Menzella
Explanation: Three suns seem to hug the horizon in this otherworldly winterscape. But the evocative scene was captured during a February 3rd snowmobile exploration of the mountainous region around Abisko National Park, northern Sweden, planet Earth. The two bright spots on either side of Earth’s Sun are parhelia (singular parhelion), also known as mock suns or sun dogs. The parhelia are caused by hexagonal ice crystals suspended in the hazy atmosphere that reflect and refract sunlight. Commonly seen in winter and at high latitudes, the bright parhelia lie along the visible 22 degree ice halo of the Sun.
Tomorrow’s picture: swooping jupiter
阿比斯库的幻日
影像提供与版权: Felipe Menzella
说明: 在这片宛如异星世界的冬季景观里，地平线上方看似悬着三个太阳。不过，这片在2月3日雪地摩托车探险之旅时所见到的景象，其实出现在地球瑞典北部的阿比斯库国家公园山区。在太阳两侧的明亮光斑称为幻日，偶而也称为假日或日狗。这种现象是悬浮在大气中的六角形冰晶反射和折射阳光所致。冬季高纬度地区常见的幻日，位于太阳周围的22度环状冰晕上。
明日的图片: swooping jupiter
