{"id":11212,"date":"2025-04-29T10:57:27","date_gmt":"2025-04-29T07:57:27","guid":{"rendered":"https:\/\/uni-mag.gr\/?p=11212"},"modified":"2025-04-30T19:58:16","modified_gmt":"2025-04-30T16:58:16","slug":"why-are-sunsets-red-are-they-only-romantic-this-way","status":"publish","type":"post","link":"https:\/\/www.uni-mag.gr\/en\/why-are-sunsets-red-are-they-only-romantic-this-way\/","title":{"rendered":"Why are sunsets red? Are they only romantic this way?"},"content":{"rendered":"\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-02-1024x768.jpg\" alt=\"\" class=\"wp-image-11195\" srcset=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-02-1024x768.jpg 1024w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-02-300x225.jpg 300w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-02-768x576.jpg 768w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-02-1536x1152.jpg 1536w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-02-2048x1536.jpg 2048w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-02-267x200.jpg 267w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>Photo of a dramatic sunset by Adrianos!<\/em><\/figcaption><\/figure>\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p class=\"wp-block-paragraph\"><strong>WHY ARE SUNSETS RED? ARE THEY ONLY ROMANTIC THIS WAY?<\/strong><\/p>\n\n<p class=\"wp-block-paragraph\">In our article about the blue sky of Earth<br\/><a class=\"\" href=\"https:\/\/www.uni-mag.gr\/en\/the-moons-sky\/\">Read here<br\/><\/a>we saw that sunlight is white. But when that white light passes through a prism, it splits into its spectrum. <\/p>\n\n<p class=\"wp-block-paragraph\"><a class=\"\" href=\"https:\/\/www.youtube.com\/watch?v=L_6weCeDDJk\">Related video<\/a><\/p>\n\n<p class=\"wp-block-paragraph\">Because of selective scattering by Earth\u2019s atmosphere, this &#8220;white&#8221; light turns into what we see above us: a blue sky during the day, when the Sun is high.<\/p>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"367\" height=\"166\" src=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-01.jpg\" alt=\"\" class=\"wp-image-11199\" srcset=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-01.jpg 367w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-01-300x136.jpg 300w\" sizes=\"auto, (max-width: 367px) 100vw, 367px\" \/><\/figure>\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p class=\"wp-block-paragraph\">But when the Sun is setting, its light travels through a much longer distance within Earth\u2019s atmosphere. The result? Beautiful, fiery-red sunsets. As we\u2019ve said before, blue light scatters more, so only red light reaches our eyes.   <\/p>\n\n<p class=\"wp-block-paragraph\">So, the blue sky and the red sunset are actually evidence that our planet has an atmosphere.<\/p>\n\n<p class=\"wp-block-paragraph\">This interaction of light with the atmosphere also creates other phenomena.<\/p>\n\n<p class=\"wp-block-paragraph\">For example:<br\/>Did you see the red Moon on March 13\u201314, 2025? Why did that happen? <\/p>\n\n<p class=\"wp-block-paragraph\">Someone might ask:<br\/>If we have a full moon once a month, why is it bright red so rarely?<\/p>\n\n<p class=\"wp-block-paragraph\">Could it be for the same reason we see the morning sky blue and sunsets red?<\/p>\n\n<p class=\"wp-block-paragraph\">In the next diagram, we see a lunar eclipse. In such an eclipse, it\u2019s clear that the Moon sometimes enters the Earth\u2019s shadow (umbra). <br\/>When the Moon is in that shadow, the blue sunlight is scattered in all directions, leaving only the red light to reach us.<\/p>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"440\" height=\"440\" src=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-03.jpg\" alt=\"\" class=\"wp-image-11203\" style=\"width:442px;height:auto\" srcset=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-03.jpg 440w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-03-300x300.jpg 300w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-03-150x150.jpg 150w, https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-03-200x200.jpg 200w\" sizes=\"auto, (max-width: 440px) 100vw, 440px\" \/><figcaption class=\"wp-element-caption\"><em>umbra = shadow &#8211; penumbra = half-shadow<\/em><\/figcaption><\/figure>\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n<p class=\"wp-block-paragraph\">The result is images like the one below.<\/p>\n\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"285\" height=\"160\" src=\"https:\/\/www.uni-mag.gr\/wp-content\/uploads\/2025\/04\/issue-12-sunsets-photo-04.jpg\" alt=\"\" class=\"wp-image-11207\"\/><\/figure>\n<div style=\"height:25px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p class=\"wp-block-paragraph\">For many ancient cultures, this red Moon was frightening. The Inca, for example, believed that a jaguar had bitten a piece out of the Moon. <\/p>\n\n<p class=\"wp-block-paragraph\">Folk wisdom holds many such fascinating stories \u2014 perhaps worth exploring more deeply sometime.<\/p>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p class=\"card-text\">But when the Sun is setting, its light travels through a much longer distance within Earth\u2019s atmosphere. The result? Beautiful, fiery-red sunsets.  [&#8230;]<\/p>\n<p class=\"m-0\"><a class=\"btn btn-outline-secondary btn-read-more\" href=\"https:\/\/www.uni-mag.gr\/en\/why-are-sunsets-red-are-they-only-romantic-this-way\/\">Read More<\/a><\/p>\n","protected":false},"author":3,"featured_media":11192,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2658,139],"tags":[2820,2822,938,2817,2814,2815,2823,2816,2821,2819,2818,2813,2786],"class_list":["post-11212","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-issue-12-en","category-issues-en","tag-astronomical-phenomena","tag-earths-atmosphere-en","tag-full-moon","tag-light-diffusion","tag-light-scattering","tag-lunar-eclipse","tag-optical-phenomena-en","tag-red-moon","tag-red-sky-en","tag-science-and-folklore","tag-sky-colors","tag-sunset","tag-uni-mag-en"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Why are sunsets red? 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