Terraforming Venus and Mars would be very difficult, but terraforming both simultaneously could be the solution!
flowing on their surfaces. As our knowledge of “Earth’s Sister Planet” and “Earth’s Twin” has advanced, so too have proposals for how these planets could be made even more like Earth.
The existence of Earth-like conditions on these planets would allow for exponential growth - economically, socially, and intellectually. With three terrestrial planets settled and sustaining life, humanity would enter an era of post-scarcity and be safe from any cataclysmic fate that affected a single world.
The atmosphere is composed mainly of carbon dioxide , the remainder being nitrogen and trace gases. This led to the runaway Greenhouse Effect in Venus’ atmosphere and the accumulation of sulfuric acid clouds. The surface atmospheric pressure is estimated at 93 bar, roughly 92 times the air pressure on Earth at sea level.
At the other end of the HZ is Mars. The Red Planet orbits our Sun at an average distance of about 155.72 million mi , or one and a half times the distance between the Earth and the Sun . Mars receives about half as much solar radiation at this distance as Earth. Its wider orbit results in an orbital period of 686.98 days, making a year on Mars almost twice as long as one on Earth.
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