Clouds of gas with masses greater than the Bonnor-Ebert mass must inevitably undergo gravitational collapse to form much smaller and denser objects.

The densest objects in globular clusters are expected to migrate to the cluster center due to mass segregation.

Chandra data suggested that RX J1856.5-3754 and 3C58, previously thought to be pulsars, might be even denser objects: quark stars.

Black holes are nature's densest objects, thought to be formed when massive stars collapse under their own weight.

Neutron stars represent some of the densest objects known in the Universe.

Because less dense objects rise in relation to denser objects, the area being heated becomes a broad dome (see isostasy).

Neutron stars are some of the densest objects in existence, only beaten out by black holes.

Density is a measure of how much mass something has, and so a denser object will weigh more than a less dense object of the same size.

Methane, ammonia, carbon dioxide; and sometimes denser objects struck it and embedded themselves, so that it held rocks, and iron.

On the other hand, denser objects, (say a piece of steel fashioned into the shape of say, a handgun) will fall more quickly.