When cosmic rays interact with the protosolar disk, they can trigger nuclear reactions that naturally produce short-lived radioactive elements, including aluminum-26. What surprised us was how well ...

For decades, a sharp kink in the energy spectrum of particles raining down from space has taunted astrophysicists, hinting at powerful engines in our Galaxy but refusing to reveal their identity. Now ...

Michigan State University astrophysicists are closing in on one of space science’s biggest mysteries: where the galaxy’s most energetic particles come from. Their studies uncovered a pulsar wind ...