NASA Science Editorial TeamAugust 12, 2018CategoriesGoddard Space Flight CenterHeliophysicsHeliophysics DivisionParker Solar Probe (PSP)The SunThe Sun & Solar Physics Delta IV Second Stage In Coast PhaseThe Delta IV Heavy second stage has fired its RL10 engine for the second and final time and is now in a coast phase. Next up is second stage separation. NASA Science Editorial TeamAugust 12, 2018CategoriesGoddard Space Flight CenterHeliophysicsHeliophysics DivisionParker Solar Probe (PSP)The SunThe Sun & Solar Physics