"Reaching the sun is, remarkably, more difficult than reaching the outer planets, or leaving the solar system altogether." A fact that I independently stumbled

"Reaching the sun is, remarkably, more difficult than reaching the outer planets, or leaving the solar system altogether." A fact that I independently stumbled upon in Kerbal Space Program when I was trying to fly my Kerbals directly into the Sun. It was surprisingly difficult (still haven't achieved it - no spoilers please!), but obvious after a few moments thought.