Parker Solar Probe Countdown to T Zero in 4K flying , Hotter and Closer Than Ever to the Sun |NASA|

NASA's Parker Solar Probe and its United Launch Alliance Delta IV Heavy launch vehicle prepare for an unprecedented mission to "kiss the Sun."
The spacecraft aims to unravel 60 years' worth of mysteries surrounding the Sun’s corona. Watch this 4K video as NASA’s Launch Services Program continues the countdown to T-zero.