Wow, I’m striking out here. The last two questions I asked were already more-than-well answered.
Maybe not this one: how big does an object (in space, presumably) have to be to have another object actually be so gravitically attracted to it to go into orbit, or fall (should I say “be attracted to”) the surface of the larger object?
Is it a size relationship? For example, say the big object is the size of those very large beach balls (4-5 feet in diameter) and the smaller object is a grain of sand. Would the grain of sand start to orbit the beach ball when it came close enough, or even fall to the surface of the beach ball?
Or is it a density relationship? The beach ball being made of lead, perhaps.
Just when does gravity start manifesting its power? Can an astronaut go into orbit (by himself, not in a ship) around a tiny asteroid, say, 1 mile in diameter?
These questions actually keep me up at night.