Yet its gravity was low, and Jan wondered why it had so dense an atmosphere.

Another problem with the dense and cold atmosphere is that convection would be huge.

I listened for a call, and in that dense atmosphere a voice could reach very far.

But the great concentration of oxygen (20 percent) in the earth's dense atmosphere is very hard to explain by this process.

But he could feel the dense atmosphere pressing down against his chest and shoulders.

Such life was common to almost all planets having a dense, oxygen-rich atmosphere.

They belched water and gas onto the surface, keeping the atmosphere dense.

The world was beautiful, larger than Earth, its atmosphere so dense that many plants were airborne.

The planet is depicted as having a dense atmosphere but with a solid surface.

They live on a planet with very low light levels due to its dense atmosphere.