What causes ionic wind?

The phenomenon of ionic wind has been known about for centuries: by applying a voltage to a pair of electrodes, electrons are stripped off nearby air molecules, and the ionized air collides with neutral air molecules as it ...

Image: Wildfire smoke crosses U.S. on jet stream

When you live on the East Coast and hear about the West Coast wildfires you assume those wildfires won't have any personal effect on you other than empathy for those in the paths of the fires. Think again.

Coffee-ring phenomenon explained in new theory

The formation of a simple coffee stain has been the subject of complex study for decades, though it turns out that there remain some stones still to be turned. Researchers at the University of Nevada, Reno have modeled how ...

Don't build your model on sand

Volcanic ash can damage jet engines, and Ludwig-Maximilians-Universitaet (LMU) in Munich volcanologists have developed a new empirical model for assessment of the risk. Their results show that tests using sand do not reflect ...

Magnetic fields in powerful radio jets

Super-massive black holes at the centers of galaxies can spawn tremendous bipolar jets when matter in the vicinity forms a hot, accreting disk around the black hole. The rapidly moving charged particles in the jets radiate ...

NASA image: Smoke from western fires wafts eastward

On August 21, 2015 the Aqua satellite captured this image of the smoke from the fires on the west coast of the United States wafting eastward on the jet stream. In this image the smoke is obscuring parts of Montana, North ...

Distant black hole wave twists like giant whip

Fast-moving magnetic waves emanating from a distant supermassive black hole undulate like a whip whose handle is being shaken by a giant hand, according to a new study using data from the National Radio Astronomy Observatory's ...

Physicists create tabletop antimatter 'gun'

(Phys.org) —An international team of physicists working at the University of Michigan has succeeded in building a tabletop antimatter "gun" capable of spewing short bursts of positrons. In their paper published in the journal ...

Saturn's little wavemaking moon

Captured on January 15, this narrow-angle Cassini image shows an outer portion of Saturn's A ring on the left and the ropy F ring crossing on the right. The thin black line near the A ring's bright edge is the Keeler Gap, ...

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