每日一图 (每日约13.30更新)
How many sunspots can you see? The central image shows the many sunspots that occurred in 2025, month by month around the circle, and all together in the grand central image. Each sunspot is magnetically cooled and so appears dark -- and can last from days to months. Although the featured images originated from NASA's Solar Dynamics Observatory, sunspots can be easily seen with a small telescope or binoculars equipped with a solar filter. Very large sunspot groups like recent AR 4366 can even be seen with eclipse glasses. Sunspots are still counted by eye, but the total number is not considered exact because they frequently change and break up. Last year, 2025, coincided with a solar maximum, the period of most intense magnetic activity during its 11-year solar cycle. Our Sun remains unpredictable in many ways, including when it ejects solar flares that will impact the Earth, and how active the next solar cycle will be.
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遇到奇事,自己不能太敏感
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必须强化遵守三条减重规则
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争取早日去见沈阳的大舅
发表于:2022-05-10 15:05:07
全天研究了新模块开发
发表于:2022-09-16 18:05:36
欢迎访问使用新开发的功能模块
发表于:2022-03-04 10:56:48
提醒自己,这是暂时的平静
发表于:2022-10-12 03:18:03
科技渴求榜 渴求
今天,又是渴求大奖
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我的人生生存和发展基础难道是可鄙的?
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