What is the density of an object on space?

Answer 1

The density of space varies due to where in space you are. For example, in clouds of dust the density is much higher but in the rest of space the density is very low. It is impossible to calculate the overall average density of space as you would have to know exactly the mass of all the planets, moons, stars and dust in the entire universe and the exact area of the universe. This in itself is impossible as the universe is constantly expanding, meaning that the density of space is continuasly decreasing. Basically, even if you could measure the size of the universe and the mass of all the objects in it the answer would immediately be out of date.

However, we can estimate the rough density of our solar system. I don't know the numbers but if the solar system was a room. 10m long, 3m high and 6m wide, then all the matter in the solar system would fit into a grain of sand.

In short, we do not know exactly, but we know it is low.

Answer 2

Density is defined as (mass) divided by (volume).

Neither quantity depends on gravity, so neither quantity changes, on the moon, in space, etc.

An object's density on a spaceship is the same as it is on earth.

Answer 3

Density is the mass of an object divided by an object's volume. If the object does not swell or shrink in space (changing the volume) then its density will remain the same.

An object's mass is the same on Earth, as it is in space, as it is on the moon. Mass is not tied to gravity and thus does not change with location.

Weight however is dependent upon gravity. An object's weight is more on Earth, less on the moon, and zero in outer space.

Answer 4

Space has been called a vacuum. However it is not but it is in places very close.
Space can and does contain matter. The density varies. The further you go from physical bodies then particles become more rare. Interstellar space in our galaxy is more dense than the space between galaxies. Even so particles are very rare in space, hence it is called a vacuum