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25 votes
Accepted

Is Earth's Atmospheric Thickness Related to Cosmic Ray Radiation?

It won't be (and isn't) zero. To see that, you want the plot on a logarithmic scale. Thus there isn't really a question to answer. The attenuation of cosmic rays will follow some exponential decay ...
ProfRob's user avatar
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9 votes
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Earth's magnetic field vs. refrigerator magnet

Can any magnet (or even one much stronger) of the Earth divert the cosmic rays as Earth's? No, because even if the strength of the field may be higher, the size of magnetic field is too small. ...
gerrit's user avatar
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9 votes
Accepted

Could this be a cosmic ray hit on my cameras sensor (CMOS, DSLR)?

It's a track about 50 pixels long, at 4.1 $\mu m$ per pixel that's 200 $\mu m$ in the plane of the sensor. It's about 1 pixel wide, quite lumpy, and seems to change direction a bit. It really fits ...
uhoh's user avatar
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6 votes
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Is there an equivalent of the red shift effect for cosmic rays?

Yes, there is a "retardation of the co-moving velocity" of particles. It is important to take it into account to understand the time history of peculiar velocities of galaxies and for ...
eshaya's user avatar
  • 4,049
6 votes

Why do we not use optical telescopes to study cosmic rays directly?

Preface: cosmic rays are technically not the main interests for Cherenkov telescopes, they usually focus on very high energy gamma rays and showers from cosmic rays (mainly protons) are considered ...
samcarter_is_at_topanswers.xyz's user avatar
5 votes

Is Cosmic Ray Astronomy a thing?

Yes, cosmic-ray astronomy is a thing, and it has been for a while. More generally, there is multi-messenger astronomy since there are now multiple windows through which we are able to observe the ...
Daddy Kropotkin's user avatar
4 votes

Source of high energy cosmic particles

Normally, the two main sources of cosmic rays are considered to be the Sun (solar energetic particles) and galactic or extragalactic sources, although extragalactic sources are more common. ...
HDE 226868's user avatar
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3 votes
Accepted

In the observed cosmic rays resulting from a supernova, can we expect electrons to arrive before protons?

We cannot directly observe cosmic rays from supernovae so measurement of a time delay between energetic electrons and nuclei isn't possible. In any case, the acceleration mechanism isn't immediately ...
ProfRob's user avatar
  • 155k
3 votes

Is there an equivalent of the red shift effect for cosmic rays?

The de Broglie relation suggests the "wavelength of a particle" is proportional to the reciprocal of its momentum. Like all wavelengths, the de Broglie wavelength is effectively stretched by ...
ProfRob's user avatar
  • 155k
3 votes
Accepted

Cosmic microwave background radiation: why did it take so long to get here?

Here's a very, very simple explanation: "why did it take so long to get here?" There's two aircraft carriers, A and B, fifty miles apart on the ocean. You've got a helicopter that flies 50 mph. Of ...
Fattie's user avatar
  • 946
2 votes

Can we manipulate cosmic rays?

Most of the communication on Earth and to-fro Space takes place over low frequency visible, infrared, micro and radio wave spectrum of the electromagnetic spectrum. The immediate benefits of using ...
Knu8's user avatar
  • 528
2 votes

Did the International Sun-Earth Explorer detect cosmic rays other than gamma rays?

Yes, several experiments onboard the ISEE satellites were devoted to detecting or characterizing both solar and galactic cosmic rays, including, among others, the Low Energy Cosmic Ray Experiment (...
HDE 226868's user avatar
  • 37k
2 votes

What kind of radiation do supernova remnants emit?

Young supernova remnant release a substantial amount of radiation as they expand into the interstellar medium. In the free expansion phase, the outgoing shock wave heats up matter to $\sim10^6$ Kelvin,...
HDE 226868's user avatar
  • 37k
1 vote
Accepted

How do remnants of supernova have a magnetic field which cause the insane speed of cosmic rays?

The magnetic field of neutron stars is generated by a magnetohydrodynamic dynamo. This is essentially the same process that forms the magnetic field of the Sun and the Earth, but continued to an ...
James K's user avatar
  • 125k
1 vote

How has cosmic ray flux changed over time?

For the last 10,000-1,000,000 years, we have cosmic ray tracks and gas products in meteorites. There has been a bit of a shift in angular distribution over the sky over the course of years-decades, ...
caInstrument's user avatar
1 vote

Why are most cosmic rays positively charged? Has anyone figured this out yet?

The most abundant subatomic particle in cosmic rays, is the proton (positively charged nucleon, baryon) not electron has 3 reason. There are 2-3 major reasons for this: Any electron would be bent by ...
Arjun's user avatar
  • 1,474
1 vote

What kind of radiation do supernova remnants emit?

I assume you are talking about neutron stars. Some supernovae leave nothing except a black hole, and these dense remnant objects are typically surrounded by a lot of more scattered material that was ...
Steve Linton's user avatar
  • 10.3k
1 vote

What are the sources of antimatter particles in the magnetosphere?

Matter and antimatter particles are always produced as a pair. This particle physics' process is called pair production. If antimatter is detectable, it means that the antiparticle of a matter-...
B--rian's user avatar
  • 5,626
1 vote

Did the International Sun-Earth Explorer detect cosmic rays other than gamma rays?

NASA's mission definition of the International Sun Earth Explorer programm reads: The International Sun-Earth Explorer, or ISEE, program was an international cooperative program between NASA and ESA ...
B--rian's user avatar
  • 5,626
1 vote
Accepted

Can cosmic rays alone produce noticeable aurorae in bodies far away from the Sun?

You may be interested to learn that Jupiter experiences aurora on its poles nearly (if not totally) non-stop. These aurora never cease, because they do not rely entirely on the sun as their source of ...
Sigismund's user avatar
  • 168

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