Unprotected, a solar flare can rapidly give you radiation sickness, which makes you tired and also makes you vomit. Fortunately for all involved, most spacecraft have thick enough walls that the crew should be protected from solar flares, but it’s generally considered good practice to reduce all possible risks. On the other hand, cosmic rays are not so easily stopped.
Because cosmic rays are fundamentally a charged particle, using a miniature magnetosphere surrounding the spacecraft would be an effective way of keeping them away from both your crew and the walls of the spacecraft; if this could be built into a spacecraft, you wouldn’t need to bulk up the outer surfaces of the craft for radiation protection. However, actually doing so is a bit beyond us at the moment.
This is not a given, because to create such a magnetic field, you need to add extra stuff to your spacecraft; the more mass you have, the more stuff Galactic cosmic rays can bash into, filling your craft with extra radiation. However, these portable magnetospheres are only just in the design phase --the next big steps will be building them, making them lighter, easier to power and making sure they work they way we hoped they would. At this point, all we can really say is that it should be possible. We'll have to wait and see if it's also practical.
The challenge facing a potential manned Mars mission - to be protected from damaging galactic cosmic energy - is to the level that faced the Apollo missions - and beyond. We don't have these capabilities now, and didn't then.
Doesn't good science research ALWAYS do this?
Ah, one of the few that actually reads more than links! Needed: actual justification for a Mar's mi$$ion, and if so, nuclear powered rocket tug boat - and long nano cable - and better shielding
Lockheed Martin Selected to Develop Nuclear-Powered Spacecraft ..26 Jul, 2023,. "These more powerful and efficient nuclear thermal propulsion systems can provide faster transit times between destinations. Reducing transit time is vital for human missions to Mars to limit a crew's exposure to radiation," said Kirk Shireman, vice president of Lunar Exploration Campaigns at Lockheed Martin Space. An NTP system uses a nuclear reactor to quickly heat hydrogen propellant to very high temperatures and then funnels that gas through the engine nozzle to create powerful thrust. The fission-based reactor will use a special high-assay low-enriched uranium, or HALEU, to convert the cryogenic hydrogen into an extremely hot pressurized gas. The reactor will not be turned on until the spacecraft has reached a nuclear safe orbit, making the NTP system very safe. Material that includes carbon with the same structure as diamond could be used to protect satellites from space radiation. [paywalled] advancements in science and technology, especially in the field of nanomaterials technology, it is now possible to produce radiation protection materials that offer high all-around performance. This article discusses the current research on composite-based radiation shielding materials. It first describes the current state and distribution of radiation shielding studies worldwide. Then, it categorizes and reviews composite-based radiation protection materials, taking into account the study topic and the field’s requirements. The three broad categories of composite-based radiation protection materials are polymer- [paywalled]
How about an assisted living space hotel for handicapped persons?