It would be nice to test this directly by measuring the magnetic field of a pulsar.
Moreover, there is (controversial) evidence of a long-term weakening trend in the magnetic field strength of sunspots.
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One of them, iTesa, is to record the magnitude of the magnetic field around the phone during orbit.
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Until now, scientists thought the effects of the magnetic field were so weak that they could be ignored.
The Boston University team say the streams originate in the magnetic field near the edge of the black hole.
The result was that the nail could attract little bits of iron on a table thanks to the magnetic field.
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The magnetic field associated with these particles helps protect the Earth from cosmic rays by deflecting them from the planet.
That would change the way the magnetic field of the iron oxide interacts with the semiconducting behaviour of the lead selenide.
They may cause local changes in the direction of the magnetic field, confusing pigeons that use it to find their way home.
The magnetic field lines are like the two lanes of traffic on a busy road: close together, but pointing in opposite directions.
The magnetic field forces the particles toward the north and south poles.
Normally, the spin of each photon would rotate by a certain amount, thanks to its interactions with the magnetic field of the atoms.
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That is because the transmitter uses a large flat coil, placed over the heart, to generate the magnetic field that powers the receiver.
In ranging, they withdraw the drill pipe and put down an electrical cable and actually try and sense the magnetic field around the wellbore.
The magnetic field is also more intense at this point, whereas before hitting this point, Voyager 1 had been detecting a decrease in its intensity.
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In some of the packing arrangements, the quantum dots are huddled together, and thus are less susceptible to the magnetic field from the iron oxide nanoparticles.
Shock waves from the impact would travel through the planet and disrupt the crust on the other side, causing changes in the magnetic field recorded there.
However, this current itself twists around and around as it flows through the magnetic field, the way a torrent of water twists up a fire-fighter's hosepipe.
The system detects any change in the magnetic field on or behind the goal line to determine if a goal has been scored and alerts the ref.
In the case of the Kaba Simplex, the magnetic field is able to move a critical component and allow the lock to be opened without the proper code.
In the 70 or so microseconds (millionths of a second) before the equipment is mashed, the inrushing walls of the magnet will squeeze and concentrate the magnetic field.
They had been looking for the point at which the magnetic field and the plasma switch from a slow, gentle waltz to something like an American square dance.
The committee said sudden fluctuations in the magnetic field caused by weather in space or nuclear attack, could wipe out electricity and GPS, used by the military and financial markets.
When Cluster II passes through these so-called polar cusps, instruments on board each of its satellites will measure the magnetic field, electrical current and number of charged particles within the tetrahedron.
Exactly how the fish "imprint" the magnetic field near where they were born is unknown, but the scientists believe the change from fresh to saltwater triggers some kind of neurological process.
They tend, on balance, to point up, as this means that they are pointing in the same direction as the magnetic field a configuration that is much more stable than the reverse.
The same thing happens with the magnetic field lines, which suddenly reconnect, resulting in a hole a few kilometres wide in the armour of the magnetosphere, through which plasma can spill.
But in Dr Rostoker's reactor, the helium nuclei created by the process of light fission would be speedy enough to escape from the ends of the ellipsoid, where the magnetic field is weakest.
"You could think about that as... a kind of 'heads-up display' like what pilots have: an image of the magnetic field... imprinted on top of the image that they see around them, " he said.
The most persuasive evidence that Voyager 1 has crossed the termination shock is its measurement of a sudden increase in the strength of the magnetic field carried by the solar wind, combined with an inferred decrease in its speed.
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