Thanks for the tip. Alas in most of my attempts the planet ended up filling up the entire screen before I could reach enough mass to absorb him, so there was no where to escape and I just got grinded up. Did I run into a bug by chance?
Sounds like a bug yeah, the planets shouldn't take up that much of the screen, but I could see there being a potential issue around the timing of when the planet is spawned and changes in the player's size.