<ul data-eligibleForWebStory="true"><li>A glowing cloud of energetic particles spanning nearly 20 million light-years across space has been discovered by astronomers around a galaxy cluster.</li><li>The cloud surrounds a galaxy cluster known as PLCK G287.0+32.9, located 5 billion light-years from Earth, making it the largest structure of its kind ever found.</li><li>Scientists believe the cloud is not powered by stars or galaxies, but by shockwaves and turbulence in the space between them.</li><li>The discovery includes a massive radio halo stretching 11.4 million light-years across, emitting radiation at a frequency where such halos are typically unseen.</li><li>This phenomenon challenges existing ideas about particle energization and offers insights into cosmic magnetic fields, a major mystery in space science.</li><li>X-ray images from NASA's Chandra Observatory indicate additional peculiar features in the cluster, suggesting violent collisions and black hole eruptions.</li><li>The discovery highlights the universe's many remaining secrets, emphasizing the need for further research.</li></ul>

Astronomers discover record-breaking cloud around galaxy cluster

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