The CNO Cycle
Gives way around need for p n
during the collision
Still must happen later – but don’t
need to rare events simultaneously
Trade off is need for higher energy
collisions  (T>16 million K)
Add p to some nucleus where new
one is still “stable”
Wait for p n while that nucleus
just “sits around”
The net effect is still   4  1H   4He
C just acts like a “catalyst”