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Scientists Discover Way to Send Information into Black Holes Without Using Energy

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Could Permanent Magnets Save Astronauts from Deadly Solar Storms? Scientists Explore a Surprising Space Shield

Space agencies around the world are preparing for the next great adventure—sending humans deeper into space than ever before. Missions to the Moon, Mars, and beyond are becoming more realistic every year. But one major challenge still stands in the way: space radiation.

Unlike astronauts aboard the International Space Station, deep-space travelers lose the protection of Earth's magnetic field. That means they are exposed to dangerous radiation that can seriously harm the human body. Scientists have been searching for better ways to protect astronauts, and now a new study suggests that permanent magnets could become part of the solution.

Researchers from Italy and Germany have investigated whether powerful permanent magnets could help shield astronauts from harmful solar radiation without the heavy weight or high power demands of existing technologies. While the idea isn't perfect, it could become an important piece of future space missions.

The Invisible Danger in Deep Space

Space may look peaceful, but it is filled with invisible high-energy particles traveling at incredible speeds. These particles can pass through spacecraft walls and even human bodies.

Scientists are mainly concerned about two types of radiation.

The first is Galactic Cosmic Rays (GCRs). These are extremely energetic particles that come from distant parts of the universe. They travel through space continuously and arrive from every direction. Because of their high energy, they are very difficult to block.

The second threat is Solar Particle Events (SPEs), commonly known as solar storms. During these events, the Sun suddenly releases huge numbers of high-speed protons toward space. If a spacecraft happens to be in their path, astronauts can receive dangerous radiation doses in a short time.

Even relatively low radiation exposure over long periods can increase the risk of cancer, damage the nervous system, weaken the immune system, and cause other serious health problems.

Why Current Radiation Shields Are Not Enough

Today, the most common way to protect astronauts is by placing thick layers of material between them and the radiation.

Materials such as aluminum, polyethylene, and even water can absorb some of the incoming particles. Water is especially useful because astronauts already need it for drinking and other daily activities.

However, there is one major problem—weight.

Launching heavy materials into space is incredibly expensive. Protecting astronauts from a powerful solar storm could require carrying several tons of shielding material. Every extra kilogram increases launch costs and makes deep-space missions much more difficult.

The Superconducting Magnet Solution

Another idea scientists have explored is using superconducting magnets.

These magnets create powerful magnetic fields that can bend the paths of charged particles, pushing dangerous radiation away from the spacecraft.

In theory, this approach works well. But superconducting magnets come with serious challenges.

They must be kept at extremely low temperatures using cryogenic cooling systems. They also require a constant supply of electricity.

If either the cooling system or the power supply fails, the magnetic shield disappears immediately, leaving astronauts exposed to dangerous radiation. Building such systems also adds complexity, cost, and maintenance requirements.

A Simpler Alternative: Permanent Magnets

Instead of relying on electricity, researchers wondered if permanent magnets could perform a similar job.

Permanent magnets, like those made from neodymium-iron-boron (NdFeB), produce magnetic fields without needing any power.

They are already widely used in electric vehicles, wind turbines, speakers, and industrial equipment. They are reliable, durable, and continue working even if the spacecraft loses power.

This makes them an attractive option for long-duration missions where reliability is essential.

Testing the Idea

To test their concept, the researchers created a computer model of a magnetic shield made from 1,482 small permanent magnets.

Each magnet measured just 3 × 3 × 3 centimeters.

Together, the magnets covered an area of about one square meter and weighed less than 300 kilograms—much lighter than carrying several tons of traditional shielding material.

The team then simulated a beam of protons similar to those produced during a solar particle event.

The results were encouraging.

The Magnets Successfully Deflected Some Radiation

The permanent magnet shield managed to deflect around 20% of incoming solar particles with energies between 0.1 and 10 MeV.

Rather than stopping every particle, the magnets mainly pushed away lower-energy protons while allowing the highest-energy particles to continue through.

Scientists describe this behavior as acting like a high-pass filter.

Although blocking only one-fifth of incoming particles may not sound impressive, reducing radiation exposure by even 20% could significantly improve astronaut safety during a solar storm.

Every reduction in radiation dose lowers the overall health risk during long missions.

But There Are Important Limitations

Despite the promising results, permanent magnets are far from being a complete solution.

The biggest limitation is that they do not effectively protect against Galactic Cosmic Rays.

Unlike solar storms, which generally come from one direction, cosmic rays arrive randomly from every part of space.

Since the magnetic field produced by the shield mainly works in one direction, it cannot stop particles approaching from all angles.

That means astronauts would still remain exposed to one of the most dangerous forms of space radiation.

A Risk of Secondary Radiation

There is another possible concern.

When high-energy protons collide with the magnets themselves, they could create secondary radiation, including neutrons or gamma rays.

Instead of eliminating the danger, the shield might accidentally produce new forms of radiation in certain locations around the spacecraft.

Scientists still need to understand whether this effect would be small or significant before the technology could be used in real missions.

Magnets Can Also Lose Strength

Permanent magnets are durable, but they do not last forever.

Over many years in the harsh environment of space, their magnetic strength may gradually decrease through a process called demagnetization.

As the magnetic field weakens, the shield would become less effective.

Future research must determine how long these magnets can maintain their protective power during multi-year missions to Mars and beyond.

A Hybrid Shield Could Be the Future

Rather than replacing existing radiation protection systems, permanent magnets may work best as part of a hybrid shielding system.

Scientists imagine combining:

  • Passive shielding materials like water or polyethylene

  • Superconducting magnets for powerful protection

  • Permanent magnets to provide reliable, power-free shielding against lower-energy solar particles

Together, these technologies could offer stronger and more dependable protection than any single method alone.

What Happens Next?

The current research is still in its early stages.

The team now plans to perform much more detailed Monte Carlo simulations, which can model the complex and unpredictable radiation environment of deep space much more accurately.

These simulations will help determine how permanent magnets perform when particles arrive from multiple directions rather than in a simple beam.

If future studies continue to show positive results, permanent magnetic shields could become an important addition to future spacecraft.

A Small Idea with Big Potential

Protecting astronauts from radiation remains one of the greatest challenges in human space exploration.

Permanent magnets are not a perfect shield. They cannot stop every dangerous particle, and several technical problems still need to be solved.

However, their biggest advantages are simplicity, reliability, and the fact that they require no electricity or cooling systems to operate.

Even reducing radiation exposure by 20% during a dangerous solar storm could make a meaningful difference for astronaut safety.

As humanity prepares for missions to Mars and beyond, every extra layer of protection matters. Permanent magnets may not solve the radiation problem on their own, but they could become an important part of the next generation of spacecraft, helping astronauts travel farther into the Solar System with greater confidence and safety.

Reference: Valerio Parisi et al, A First-Order Assessment of Permanent Magnet Deflection for Space Radiation Protection, arXiv (2026). DOI: 10.48550/arxiv.2607.00759

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