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  1. Cosmic ray - Wikipedia

    Cosmic rays or astroparticles are high-energy particles or clusters of particles (primarily represented by protons or atomic nuclei) that move through space at nearly the speed of light. …

  2. Cosmic ray | Definition, Types, Effects, & Facts | Britannica

    Nov 25, 2025 · Cosmic ray, a high-speed particle—either an atomic nucleus or an electron—that travels through space. Most of these particles come from sources within the Milky Way Galaxy …

  3. Cosmic Rays Explained - Science Notes and Projects

    Jun 5, 2024 · Cosmic rays are high-energy particles originating from outer space that travel through the universe at nearly the speed of light. They consist predominantly of protons and …

  4. What are cosmic rays? | University of Chicago News

    Cosmic rays are actually particles from space that travel across the universe. They started out as atoms that had their outer layers stripped away and are now just nuclei. They move extremely …

  5. What Are Cosmic Rays? - Space

    Jun 19, 2023 · Cosmic rays are energetic subatomic particles produced by naturally occurring particle accelerators in outer space. They span a huge range in energies and a variety of types …

  6. What Are Cosmic Rays And Where Do They Come From?

    Oct 19, 2023 · Cosmic rays are forms of high-energy radiation – consisting of atomic nuclei or high-energy protons – that travel throughout our home galaxy, i.e., the Milky Way. Cosmic …

  7. Cosmic Rays - Introduction - Imagine the Universe!

    Sep 6, 2017 · Cosmic rays provide one of our few direct samples of matter from outside the solar system. They are high energy particles that move through space at nearly the speed of light.

  8. Cosmic Rays – Definition & Detailed Explanation - Sentinel Mission

    Oct 31, 2025 · Cosmic rays are high-energy particles that originate from outside the Earth’s atmosphere. They consist of protons, electrons, and atomic nuclei that travel through space at …

  9. Cosmic Rays: The Universe’s High-Energy Particles

    Mar 18, 2025 · Cosmic rays are more than just high-energy particles—they’re messengers from the farthest reaches of the cosmos. They carry secrets about how stars die, how galaxies …

  10. Understanding Cosmic Rays and Their Effects - Simple Science

    May 28, 2025 · A look into cosmic rays, their origins, and their impact on Earth. Have you ever wondered what those tiny particles flying through space are? Well, you're...