High-energy cosmic rays may originate within the Milky Way galaxy 

 The most energetic particles in the universe appear to emerge from sources within the Milky Way, our own home. 

https://cdn.mos.cms.futurecdn.net/7kmmPgNZM7s9p4uS2xxVNB.jpg

https://www.space.com/iss-cosmic-ray-detector-energetic-particles-milky-way