Here's why:

* Density is an intrinsic property: Density is defined as mass per unit volume (ρ = m/V). The mass of an object and its volume remain the same regardless of the gravitational environment.

* Microgravity doesn't affect mass or volume: While microgravity significantly reduces the force of gravity acting on an object, it doesn't change the object's fundamental properties like its mass or volume.

However, the appearance of an object can change in microgravity. For example, a liquid in microgravity might assume a spherical shape due to surface tension, but its density remains constant. Similarly, a gas might expand and occupy a larger volume, but its density will decrease proportionally.

In summary: While microgravity can influence the shape and distribution of matter within an object, it doesn't alter the fundamental density, which is a property inherent to the object itself.