Source:  Solar Atmospheres

Vacuum furnaces are highly flexible tools capable of providing numerous thermochemical conditions with various reactive gases at elevated temperatures and extreme pressures to alter the chemical or mechanical properties of materials.  Conditions inside vacuum furnaces are equivalent to conditions found on the planets in our solar system.    Each planet in our solar system is unique in terms of its atmospheric contents, pressures, and temperatures.  One planet with unique atmospheric conditions is Venus.

Read More: Vacuum Heat Treating for Space Exploration