“Even Microquasars are Powerful Particle Accelerators”

The Earth is bathed in high-energy particles. Known as cosmic rays, most of them are protons striking us at nearly the speed of light. Fortunately, the atmosphere protects us from any significant harm, though the particles can strike with so much energy that they create a shower of lower energy particles that do reach Earth’s surface. That’s actually how we can detect most cosmic rays.
We aren’t entirely sure what accelerates these particles so tremendously. There are phenomena that can do it. Nearby supernovae can generate lower energy cosmic rays, but the origin of the highest-energy cosmic rays is less understood.








