Milky Way

Cosmic rays -- high-energy particles moving close to the speed of light -- are known to arrive from within the Milky Way and from more distant regions of the universe.

The planet lies in a relatively nearby part of the Milky Way Galaxy and appears to have a rocky structure similar to Earth.

Almost every galaxy, including our Milky Way, has a black hole at its centre.

These studies show that these compact systems act as extremely powerful particle accelerators within the Milky Way and can plausibly generate the energies associated with the "knee."

Scientists have not previously been able to model a galaxy as large as the Milky Way while maintaining fine detail at the level of single stars.