If the object is gravitationally bound to the sun, it is part of the solar system. If not, not.
mass
It's Newton's first law of motion: "An oject in motion will stay in motion (with the same velocity) until an outside force acts upon it and an object at rest will stay at rest until an outside force acts upon it."
The look back time of an object is determined by how long it takes the light from that object, usually a star or galaxy, to reach an observer here on earth.
only the mass will change, the mass is the force applied by an object.
As far as we know - there is "no outside of the universe", so nothing.
Density
The density of the object or the shape of the object (like a boat) determines the buoyant force.
density!
mass
Density
no that's density
density
The size of an object has little to do with whether it will float. Size relative to weight, or density, is what determines bouyancy. If the object weighs less than the amount of water it can displace, it floats.
The centre of gravity does not, by itself, determine whether an object is at rest or in motion. The location of the centre of gravity, relative to where the object is supported, can contribute one of many forces that can act on the object. And it is is the [vector] sum of these forces which determines whether the object remains at rest or in uniform motion.
Color
The density of an object determines whether it will float or sink in water. If the object is denser than water, it will sink. If it is less dense, it will float.
Depth determines whether it shows up under or below an object if an object collides with it.