{"id":23706,"date":"2025-07-25T18:58:09","date_gmt":"2025-07-25T18:58:09","guid":{"rendered":"https:\/\/www.newsbeep.com\/ca\/23706\/"},"modified":"2025-07-25T18:58:09","modified_gmt":"2025-07-25T18:58:09","slug":"it-races-through-the-universe-at-300000-km-s-and-never-runs-out-of-energy","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/ca\/23706\/","title":{"rendered":"It races through the universe at 300,000 km\/s \u2014 and never runs out of energy"},"content":{"rendered":"<p>Light speeds along at 300,000 km\/s\u2014yet it never tires. Photons, having no mass, blaze through the near-empty vacuum of space without losing energy. When they dodge dust, gravity wells, or magnetic fields, they may scatter or dim, but those hurdles are rare in the vast cosmos.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"682\" src=\"https:\/\/www.newsbeep.com\/ca\/wp-content\/uploads\/2025\/07\/light-speed-photons-1024x682.jpeg\" alt=\"\"  \/><\/p>\n<p>Light is tireless: how does it maintain its energy through infinity? \u00a9 coffeekai, iStock<\/p>\n<p>The Relativity Paradox and Time Perception<\/p>\n<p>Einstein\u2019s <a href=\"https:\/\/www.futura-sciences.com\/en\/cosmic-twist-the-cataclysmic-collision-between-the-andromeda-galaxy-and-ours-questioned_18314\/\" rel=\"nofollow noopener\" target=\"_blank\">relativity<\/a> gives us time dilation: for humans, light journeys take ages; for photons, time stands still. If you could ride a beam of light, your departure from a distant galaxy and landing at Earth would seem simultaneous. Space itself squeezes along your route, compressing light-years into a blink.<\/p>\n<p>Astronomical Observation as a Time Machine<\/p>\n<p>Staring through a <a href=\"https:\/\/www.futura-sciences.com\/en\/new-spherex-space-telescope-reveals-ultra-detailed-cosmic-images-in-its-first-light_17623\/\" rel=\"nofollow noopener\" target=\"_blank\">telescope<\/a> is like watching history unfold. Sunlight takes eight minutes to arrive; Alpha Centauri\u2019s light takes more than four years. Photons from Orion\u2019s Nebula set out 1,500 years ago, and Andromeda\u2019s glow left 2.5 million years back. Every photon is a tiny time capsule, carrying secrets of distant stars and galaxies right into our eyes.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"100\" height=\"100\" src=\"https:\/\/www.newsbeep.com\/ca\/wp-content\/uploads\/2025\/07\/auteur-fs-100x100.webp.webp\" class=\"attachment-100x100 size-100x100\" alt=\"author-fs\" itemprop=\"image\"  \/><\/p>\n","protected":false},"excerpt":{"rendered":"Light speeds along at 300,000 km\/s\u2014yet it never tires. Photons, having no mass, blaze through the near-empty vacuum&hellip;\n","protected":false},"author":2,"featured_media":23707,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[49,48,314,66],"class_list":{"0":"post-23706","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-physics","8":"tag-ca","9":"tag-canada","10":"tag-physics","11":"tag-science"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/23706","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/comments?post=23706"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/23706\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media\/23707"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media?parent=23706"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/categories?post=23706"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/tags?post=23706"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}