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Schyte96 t1_j6oqcif wrote

Reply to comment by Musicfan637 in A spaceflight disaster was narrowly avoided in 1972. A series of intense solar flares exploded in August, just months before the launch of Apollo 17. Any astronauts on the moon at that time would have died from radiation. As NASA's new lunar missions progress, the threat of radiation still looms. by EricFromOuterSpace

On planets or the moon: Underground. Dirt and rocks make for good radiation shielding. On spacecraft that fly for long (such as to Mars) probably water tanks. Water is also an ok radiation shield. Not as good as a dense metal, but it's also something you will need to bring anyways.

There is also an electromagnetic radiation shield NASA is working on. I think there were some news on it about a year or so ago.

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