<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>universe | smithsonianmag.com</title><link>https://www.smithsonianmag.com/rss/tag/universe/</link><description>RSS feed for universe</description><atom:link href="https://www.smithsonianmag.com/rss/tag/universe/" rel="self"/><language>en</language><lastBuildDate>Fri, 23 Oct 2026 18:59:01 +0000</lastBuildDate><item><title>For the First Time, Scientists Trapped an Elusive Antimatter Particle—and Contained It for Months. It Could Allow Them to Test an Enduring Physics Theory</title><link>https://www.smithsonianmag.com/smart-news/for-the-first-time-scientists-trapped-an-elusive-antimatter-particle-and-contained-it-for-months-it-could-allow-them-to-test-an-enduring-physics-theory-180989738/</link><description>The standard model of particle physics works really well, but it can't explain why the universe exists. Something is missing, and this trapped particle might hold a clue to the answer</description><pubDate>Fri, 23 Oct 2026 18:59:01 +0000</pubDate><guid>https://www.smithsonianmag.com/smart-news/for-the-first-time-scientists-trapped-an-elusive-antimatter-particle-and-contained-it-for-months-it-could-allow-them-to-test-an-enduring-physics-theory-180989738/</guid><enclosure length="7638301" type="image/jpeg" url="https://th-thumbnailer.cdn-si-edu.com/dKzxG_7_k4wCCpGIfvH4Pk4qwlY=/420x240/filters:focal(2856x4189:2857x4190)/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer_public/44/5e/445ed094-a8d0-48e3-a3e5-81645b78445d/img_3507.jpeg"/></item><item><title>Astronomers Detect the Oldest Known Fast Radio Burst, Spewed From an Ancient Galaxy Just Three Billion Years After the Big Bang</title><link>https://www.smithsonianmag.com/smart-news/astronomers-detect-the-oldest-fast-radio-burst-spewed-from-an-ancient-galaxy-just-three-billion-years-after-the-big-bang-180989730/</link><description>The universe formed 13.8 billion years ago, so this far-traveled burst of radio waves can help scientists learn more about the early cosmos. However, researchers still aren't sure what produces these strange flashes</description><pubDate>Fri, 23 Oct 2026 17:17:35 +0000</pubDate><guid>https://www.smithsonianmag.com/smart-news/astronomers-detect-the-oldest-fast-radio-burst-spewed-from-an-ancient-galaxy-just-three-billion-years-after-the-big-bang-180989730/</guid><enclosure length="367256" type="image/jpeg" url="https://th-thumbnailer.cdn-si-edu.com/feoW6c85_GM_AC-MC1dQLTgzneE=/420x240/filters:focal(1000x867:1001x868)/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer_public/ca/d4/cad46646-727b-41ea-8627-8962d41a7a9c/stsci-01kkcjgbwx6te4abrtfwe9b8sq.jpg"/></item><item><title>NASA's Nancy Grace Roman Space Telescope Launches to Find Exoplanets and Unravel Mysteries of Dark Matter and Dark Energy</title><link>https://www.smithsonianmag.com/smart-news/nasas-nancy-grace-roman-space-telescope-launches-to-find-exoplanets-and-unravel-mysteries-of-dark-matter-and-dark-energy-180989268/</link><description>The new observatory will complete three surveys of the universe in five years, although it's designed to function at least twice as long. Its data could change scientists' basic understanding of the cosmos</description><pubDate>Sun, 30 Aug 2026 11:26:00 +0000</pubDate><guid>https://www.smithsonianmag.com/smart-news/nasas-nancy-grace-roman-space-telescope-launches-to-find-exoplanets-and-unravel-mysteries-of-dark-matter-and-dark-energy-180989268/</guid><enclosure length="16918059" type="image/png" url="https://th-thumbnailer.cdn-si-edu.com/mR5EHPrmafInwOqOOkDHiEOtvEI=/420x240/filters:focal(1800x1029:1801x1030)/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer_public/9d/98/9d98cc66-26ad-4f6e-b59e-394818f23d10/roman_beautypass2026-med.png"/></item></channel></rss>