Possible Mars Terraforming

Cool idea - "restarting the Mars core" sounds like sci-fi with a wrench 🔧🚀. Let's ground ourselves with numbers for a moment and then see what would be more realistic.

Why "bombs/reactor in the core" doesn't work

Energy scale

• 1 megaton of TNT ≈ 4.184×10^15 J ≈ 100 Mt ≈ 4.184×10^17 J.

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• Mars loses roughly a few terawatts of heat today (let's assume 3 TW = 3×10^12 W). One day of heat loss is ≈ 3×10^12 W × 86,400 s = 2.592×10^17 J.

  • Means: a 100 Mt explosion delivers approximately one day of natural heat loss—a short "heat ping" that immediately dissipates.

• To significantly heat the (largely solidified) iron core: even conservatively calculated

  • Core mass ~10^23 kg, specific heat ~800 J/(kg·K), temperature increase ~1000 K → ~10^29 J.

  • That would correspond to hundreds of billions 100-Mt explosions. Utopian.

Location & Coupling

• You can't even get in the core: it lies ~1700 km deep. Surface or crustal explosions couple heat downwards extremely poorly; They tend to blast material upwards (losing atmosphere, radioactivity, fracture zones) rather than warming the core.

Dynamo Physics

• A planetary dynamo needs long-term heat flow + convection in the conductive fluid core. Short bursts of energy don't help; One would need many terawatts permanently over geological time.

What makes sense instead (terraforming light)

1) Artificial magnetic protection instead of core heating

• Magnetic shield at Mars-L1: A large, current-carrying structure/plasma magnet in front of Mars deflects the solar wind; less atmosphere is "blown away." Technically difficult, but computationally much more efficient than core heating.

• Alternatively: a superconducting ring in orbit/equatorial space – Huge, but fundamentally scalable and maintainable.

2) Heat & pressure local instead of global (paraterraforming)

• Vaults/domes and lava tubes as cities: inside 1 bar, 20-25°C, controlled biosphere. Energy from fission/fusion reactors (as soon as available) – That's more achievable today than the entire planet.

• ISRU (In-Situ Resource Utilization): Ice (regolith/polar ice caps) to water, O₂ via electrolysis, CO₂ for greenhouses. This fits with your "water well" idea: Water exists, especially as ice.

3) Atmosphere boost without bombs

• Industrial production of PFCs/fluorocarbons (potent greenhouse gases) → targeted, reversible heating. Requires decades, but continuous and controllable.

• Orbital mirrors (concentrating sunlight) over polar regions → melting of ice, evaporation of CO₂ → some pressure/temperature increase.

• Importing ammonia/ice asteroids (chemically risky, but energetically more sensible than bombs).

4) Energy backbone

• Large-scale fission reactors for the first few centuries; fusion reactors (when ready) later. Reactors deliver continuous terawatt joules over years – exactly what climate engineering needs.

A Brief Introduction to Jupiter & Magnetism

• Jupiter's magnetosphere is gigantic, but extremely weak at a distance comparable to Mars. The solar wind dominates atmospheric development. Even if far-field couplings existed, these would be subtleties compared to the main balance (distance from the sun, thin atmosphere, missing dynamo).

Conclusion

• Bombs in the Martian interior: spectacular, but physically ineffective (heat dissipates) and risky (loss of atmosphere, fractures, radiation).

• Better: artificial magnetic protection + controlled, steady heating & pressure hornng; parallel paraterraforming for immediately habitable zones.

• Your "water well" is realistic – water as ice is there. The key is continuous power, not short energy peaks.

If you like, I can calculate a small scenario for you (power requirements, number of reactors, timelines) – e.g., "+10 K global mean temperature in 100 years" vs. "a city of millions in lava tubes in 20 years."