Its a glitch fest. I tried to land my ship near where the planets were intersecting but passed right through the ground into the empty "center" of the planet. The other planet was still hurtling at me at full speed and I was helpless but to smack right into the it. I then got stuck rubberbanding between falling through the surface and the game trying to push me back out to correct the issue. Eventually I took enough damage from hitting the surface that my ship exploded. :D I just respawned at a nearby carrier and went back to get some screenshots.
Eventually the planets will just pass through each other and everything continues until normal.