The Parker Solar Probe will make its closest approach yet to the Sun

It's actually not too brutal so long as you don't try to do it directly. Launch a craft out past Jool then when you start falling back burn retrograde. It's like the opposite of what you do to efficiently burn when leaving Kerbin.

In real life they used a set of Venus gravity assists instead. This has allowed them to slowly get closer while observing over time instead of a long wait and then one big bang close up before being shot ridiculously far back out.