4 sentences with “density”

The density of Uranus balances that of Jupiter and Saturn (which are less dense) with that of the Earth and Moon (denser).

The average density of a nebula is between three hundred and fifteen hundred atoms per cubic centimetre, which is derisory compared to the ten trillion in the air at sea level on our planet.

Although the average density of nebulae is so low that a vacuum resembling it has not been achieved on Earth, the sum total of this scattered matter in the Milky Way would be enough to build about ten thousand stars.

What we are looking at is the least dense planet in the entire solar system. Saturn has less density than water, so if there were an ocean big enough to contain it, this big yellow ball, rings included, would float in it like a giant beach ball, pushed into the sea by a naughty child.