To further your point, I like to imagine that whatever shows up on Earth is gonna be something like a von Neumann probe. Self replicating, probably AI. That wo

To further your point, I like to imagine that whatever shows up on Earth is gonna be something like a von Neumann probe. Self replicating, probably AI. That would account for the vast distances a biological body couldn't travel, as well as the violent direction changes you're talking about.