Science fiction?
It sounds like #SciFi, but #NASA's now shelved project idea #MarsSwing envisaged a long (100 km) tether attaching to an approaching spacecraft and helping to reduce its speed as it entered the Martian atmosphere to ½ of a typical entry.
The swing, designed to be made from inexpensive readily available materials, such as Spectra, would need a heavy central body to limit disturbances, like a boulder from one of Mars' moons.


















