Using the Very Long Baseline Array (VLBA), European astronomers have carried out multi-wavelength radio observations of a radio galaxy designated 3C 111. Results of the observational campaign, published March 24 on the arXiv ...
One of the most powerful objects in the universe is a radio quasar—a spinning black hole spraying out highly energetic particles. Come too close to one, and you'd get sucked in by its gravitational pull, or burn up from ...
Astronomy
Mar 31, 2025
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105
At a distance of just over four light years, Proxima Centauri is our nearest stellar neighbor and is known to be a very active M dwarf star. Its flare activity has been well-known to astronomers using visible wavelengths ...
Astronomy
Mar 27, 2025
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60
Imagine if a doctor could remotely do a non-invasive, highly precise medical procedure on her patients using a tiny robot, or microrobot. With a device researchers from SMU and George Washington University created, that is ...
Bio & Medicine
Mar 26, 2025
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20
Neptune lies in the frigid, dark, vast frontier of the outer edges of our solar system, about 3 billion miles away from the sun.
Astronomy
Mar 26, 2025
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32
Highly charged heavy ions form a very suitable experimental field for investigating quantum electrodynamics (QED), the best-tested theory in physics describing all electrical and magnetic interactions of light and matter. ...
General Physics
Mar 26, 2025
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23
Two scientists at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory have discovered a new phase of matter while studying a model system of a magnetic material.
Condensed Matter
Mar 25, 2025
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180
The standard model of particle physics is our best theory of the elementary particles and forces that make up our world: particles and antiparticles, such as electrons and positrons, are described as quantum fields. They ...
Quantum Physics
Mar 25, 2025
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158
Drugs and other treatments can be quite effective at killing cancer cells, yet many fall short as they struggle to penetrate deep into solid tumors due to physical barriers within the tissue. But in a recent study published ...
Bio & Medicine
Mar 24, 2025
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7
A trio of physicists from Princeton University, CIT's Jet Propulsion Laboratory and Spectral Sensor Solutions, all in the U.S., is proposing the possibility of generating electricity using energy from the rotation of the ...
Magnetic fields surround magnetic materials and electric currents and are detected by the force they exert on other magnetic materials and moving electric charges. The magnetic field, at a given point, is specified by both a direction and a magnitude (or strength); as such it is a vector field.
In special relativity, the electric field and magnetic field are two interrelated aspects of a single object, called the electromagnetic field. A pure electric field in one reference frame is observed as a combination of both an electric field and a magnetic field in a moving reference frame.
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