Questions tagged [cosmic-radiation]

Questions about cosmic rays and cosmic background radiation.

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32
votes
3answers
33k views

How much power would a spacecraft's magnetic shield require?

I've read over the decades that a magnetic shield might protect a spacecraft from cosmic radiation. Its a fascinating idea that might only be theory or science fiction at the moment. In regards to ...
37
votes
5answers
16k views

How did Apollo missions solve the cosmic radiation problem?

One of the major hurdles of space exploration is cosmic radiation. How did the Apollo missions solve the radiation problem? NASA would have shielded the astronauts to some level by some material. How ...
12
votes
5answers
6k views

Can cosmic background be harvested for energy?

I know it would be awfully weak, but it's present even where all other power sources would be unavailable - could cosmic level radiation be used to power minimal set of systems of a probe, say, a ...
9
votes
1answer
654 views

How do the effects of different cosmic rays compare?

Galactic cosmic rays (GCRs) are composed mostly of single protons (90%), helium nuclei, otherwise known as alpha particles, which are two protons and two neutrons (9%), and heavier atomic nuclei like ...
2
votes
1answer
207 views

What cosmic ray sensor is attached to this Balloon?

This short BBC News item shows a very large high altitude balloon lifting a science payload to measure high energy cosmic rays for about 100 days, circling the Earth perhaps twice in the process. ...
2
votes
3answers
137 views

Examples of gamma ray or X-ray imaging of small planets, moons, or asteroids, or at least how to calculate intensity thereof?

Have any spatially resolved measurements of gamma rays or X-rays from medium and small solar system bodies been collected from space? These might be planets, moons, or asteroids for example, but ...
14
votes
1answer
485 views

Is radiation dose from cosmic rays higher behind 50 cm of shielding, or lower?

I have seen it said that because high-energy GCR particles cause a spray of secondary particles when they pass through material, there is more radiation behind even quite thick shielding that there is ...
5
votes
2answers
1k views

How big is the risk/potential damage from radiation on a Mars trip?

Elon Musk just announced his concept for traveling to Mars. During the Q&A he commented that the risk of radiation danger to the passengers was low. I seem to remember concerns for the ...
6
votes
1answer
264 views

3D Model of radiation in earth orbit?

I am trying to estimate required shielding masses to maintain a radiation level at or below earths average radiation of 3 mSv per year at different earth orbits (LEO, MEO, GEO and 50000 km+). ...
2
votes
2answers
218 views

Is exposure to cosmic radiation more dangerous on some body parts than on other?

Radiation causes genetic mutation and every (human) cell in our body have the same genes. But on Earth we don't get cancer as often in the foot as in the genitals or in the brain. Some parts of our ...