The optical properties of these gases — not their weight — are critical to slowing down this radiative cooling. (scienceofdoom.com)
First of all, the theory of AGW rests mostly on our scientific understanding of how climate works, specifically the heat - trapping properties of gases such as CO2. (realclimate.org)
The simulation was visualized with a video made by combining millions of points representing numerical data about density, gravitational fields, and other properties of the gases that make up the collapsing stars. (sciencedaily.com)