I'm familiar with the concept of aerobraking. Consider an object like a star, or a planet with strong magnetic field (Earth, Jupiter, probably all of the gas/ice giants?) Could a probe use some kind of electromagnet (or maybe magnetic induction), to push against the magnetic field as it gets close to the planet, similar to aerobraking, but much farther out?
(Also, is this an old, well known idea?)
Even if there was lower deceleration, the much longer reach of the magnetic field might make it viable for starting to slow down much earlier.
I was watching a speculative video on YouTube about how tethers push against the earth's magnetic field. In that video, the idea was for a space station or skyhook or satellite to gain momentum to prevent gradual orbital decay.
But it occurred to me it might work just fine for slowing down instead.
There is some existing work for magnetic sails, to decelerate against a solar wind, but I don't really see anything comparing it to aerobraking, nor anything that considered it at the level of a planetary magnetic field.
Maybe the idea works just great, except the hardware is simply too heavy to be practical? Or if using induction — maybe the problem is if you decelerate too much, you build up too much charge and zap your space probe?