infall zone

infall zone

[′in‚fȯl ‚zōn]
(astronomy)
The region that forms between the tidal radius of a planet in formation and the actual surface of the planet when the planet contracts from the tidal radius, so that any matter that enters this region falls to the planet's surface.
References in periodicals archive ?
The contraction makes what is knwon as an infall zone between the tidal radius and the actual surface of the planet.
In the infall zone hydrodynamic effects dominate the behavior of the infalling gas, and these are yet to be calculated.