Turning Mars into a world like Earth is not possible with the tools and materials we have today. NASA supported research shows that Mars does not hold enough carbon dioxide, the main greenhouse gas needed to trap heat, and much of what remains is locked away in places we cannot reach. Without a thick atmosphere, the planet cannot keep warmth or support liquid water at the surface for long. A magnetic field, the natural shield that protects a planet’s air from the solar wind, is also missing on Mars. Building an artificial shield is far beyond current engineering.
These limits mean the idea of changing the whole planet should not guide near term plans. Work can still study local shelters and habitats, for example by using materials and light to warm small areas, but that is not the same as remaking a planet.
The claim that NASA is giving up on Mars is wrong. NASA continues to prepare for human missions, while being clear that global terraforming is out of reach for now.
Nature Astronomy – Inventory of CO2 available for terraforming Mars – 2018
Peer reviewed analysis of all known carbon dioxide stores on Mars finds they are too small or inaccessible to build a thick, warm atmosphere. The authors conclude that terraforming Mars is not possible using present day technology.
NASA – Mars Terraforming Not Possible Using Present Day Technology – 2018
NASA’s summary of the Nature Astronomy study explains that even extreme ideas like releasing all CO2 or redirecting many comets would not reach safe air pressure or temperature. Any terraforming effort would be far in the future.
NASA – Humans to Mars – 2025
NASA outlines current technology work for crewed Mars missions in the 2030s. This shows NASA is still actively pursuing Mars exploration, despite the limits on planetary terraforming.
Science Advances – Feasibility of keeping Mars warm with nanoparticles – 2024
Proposes materials that could warm local regions on Mars. This is a habitat scale idea, not a plan to terraform the planet.
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