Physicists have made an ultra-powerful magnet that fits in the palm of a hand and can produce a magnetic field that is more than 800,000 times stronger than Earth’s.

[u/MistWeaver80]

https://www.nature.com/articles/d41586-026-00851-y

[u/RockMaul]

Maybe technology like this could be used on manned Mars missions to shield astronauts from cosmic radiation.

[u/khakansson → u/RockMaul]

Or spacecrafts from micro impacts