John Cooper of Skillet Music explains why his arrangement of O Come, O Come Emmanuel takes such an aggressive turn. Death is something every listener will face, and Cooper argues that Christian music shouldn’t shy away from that agony. The key change, the modulation, the raw vocal attack—it all points to the reality of death and the hope of Christ, whose incarnation upends the entire cosmic order. Hear more on the Westminster Effects Doxology Podcast on YouTube, Apple Podcasts, and Spotify! YouT

As they zip through space, magnetic fields can deflect cosmic rays, so we have to determine their sources indirectly. When cosmic rays boosted by supernova remnants crash into gas clouds, they produce gamma rays our Fermi satellite sees: https://tmblr.co/Zz_Uqj2XaWrWy #FermiFriday | NASA Universe