> Folks don’t appreciate how much energy it actually takes to “fall” into the Earth or even the Sun. It's not that bad from the Lagrange points thanks to multi

> Folks don’t appreciate how much energy it actually takes to “fall” into the Earth or even the Sun. It's not that bad from the Lagrange points thanks to multi-body gravitational dynamics. The Lagrange points form part of the so-called 'interplanetary transit network' (https://en.wikipedia.org/wiki/Interplanetary_Transport_Network https://en.wikipedia.org/wiki/Interplanetary_Transport_Netwo...) that supports extremely low-energy transfers in the solar system, provided you're willing to wait a very long time. That being said, there's no reason to send a deep-space probe back to Earth for reentry when it's even easier to send it into a deep-space graveyard orbit of some description with no risk of any potential debris-related problems.