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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://mastodon.social/users/coreyspowell/statuses/111469073544807838">Corey S Powell (coreyspowell@mastodon.social)'s status on Saturday, 25-Nov-2023 13:49:22 JST</a><a href="https://mastodon.social/@coreyspowell" title="coreyspowell@mastodon.social"><img src="https://gnusocial.jp/avatar/32826-48-20221119233213.webp" width="48" height="48" alt="Corey S Powell" style="position: absolute; left: 0; top: 0;">Corey S Powell</a></section><article><p>The 300-square-mile Telescope Array experiment in Utah detected a cosmic ray with an energy of 240 quintillion electron volts. That's as much energy as a thrown brick, jammed into a single subatomic particle. </p><p>Nobody knows how it formed.</p><p><a href="https://attheu.utah.edu/facultystaff/cosmic-ray-2023/" rel="nofollow noreferrer">https://attheu.utah.edu/facultystaff/cosmic-ray-2023/</a><br><a href="https://mastodon.social/tags/science" rel="tag">#science</a> <a href="https://mastodon.social/tags/physics" rel="tag">#physics</a> <a href="https://mastodon.social/tags/nature" rel="tag">#nature</a></p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/2374870#notice-4689777">In conversation</a><time datetime="2023-11-25T13:49:22+09:00" title="Saturday, 25-Nov-2023 13:49:22 JST">about a year ago</time> <span>from <span><a href="https://mastodon.social/@coreyspowell/111469073544807838" rel="external" title="Sent from mastodon.social via ActivityPub">mastodon.social</a></span></span><a href="https://mastodon.social/@coreyspowell/111469073544807838">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/1879456">On May 27, 2021, the Telescope Array experiment detected the second-highest extreme-energy cosmic ray. At 2.4 x 1020eV, the energy of this single subatomic particle is equivalent to dropping a brick on your toe from waist height. Led by the University of Utah (the U) and the University of Tokyo, the Telescope Array consists of 507 surface detector stations arranged in a square grid that covers 700 km2 (~270 miles2) outside of Delta, Utah in the state’s West Desert. The event triggered 23 detectors at the north-west region of the Telescope Array, splashing across 48 km2 (18.5 mi2). Its arrival direction appeared to be from the Local Void, an empty area of space bordering the Milky Way galaxy.</a></label><br><video poster="" controls="controls"><source src="https://files.mastodon.social/media_attachments/files/111/469/065/615/440/921/original/2f02ca9145ea0fe6.mp4" type="video/mp4"></source></video></li></ol></footer></blockquote>