Picture of universe getting clearer—but much remains unknown

Even though we can explore the universe with great precision, there is still a lot we don’t know, according to Ulf Danielsson, professor of theoretical physics at Uppsala University. Besides doing research, he is keen to explain science more broadly—most recently in the book “Människan är ett mirakel” (“Human Life is a Miracle”), a collaboration […]

Trying to find baby planets swaddled in dust

When it comes to finding baby, still-forming planets around young stars, the Atacama Large Millimeter/submillimeter Array (ALMA) observatory is astronomers’ most adept tool. ALMA has delivered many images of the protoplanetary disks around young stars, with gaps and rings carved in them by young planets. In new research, a team of researchers used ALMA to […]

Simulations suggest the early universe helped black holes grow big, but not in the long run

At the heart of the Milky Way, just 27,000 light-years from Earth, there is a supermassive black hole with a mass of more than 4 million suns. Nearly all galaxies contain a supermassive black hole, and many of them are much more massive. The black hole in the elliptical galaxy M87 has a mass of […]

Webb telescope spies Io’s volcanic activity and sulfurous atmosphere

Trapped in a gravitational push and pull between Jupiter and other Jovian moons, Io is constantly being stretched and compressed. Heat generated by these contortions has melted pockets of the moon’s interior so much that Io is our solar system’s most volcanically active body.

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A space historian explores how the advent of radio astronomy led to the USSR’s search for extraterrestrial life

As humans began to explore outer space in the latter half of the 20th century, radio waves proved a powerful tool. Scientists could send out radio waves to communicate with satellites, rockets and other spacecraft, and use radio telescopes to take in radio waves emitted by objects throughout the universe.

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Golf’s cruelest moment: The physics behind the ‘lip out’ phenomenon

Picture this: It’s the 18th hole and the game’s on the line. You line up your putt, take a breath, and roll the ball toward the hole. The pace is firm, the line looks good—until the ball dips in, then cruelly pops back out onto the green. New research led by the University of Bristol […]

Photoinduced non-reciprocal magnetism effectively violates Newton’s third law

A theoretical framework predicts the emergence of non-reciprocal interactions that effectively violate Newton’s third law in solids using light, report researchers from Japan. They demonstrate that by irradiating light of a carefully tuned frequency onto a magnetic metal, one can induce a torque that drives two magnetic layers into a spontaneous, persistent “chase-and-run” rotation. This […]

Optimizing avalanche photodiode design for photodetection in the ultraviolet wavelength

Geiger-mode avalanche photodiodes (GM-APDs) are highly sensitive light detectors, capable of detecting single photons. Photons of certain wavelengths, when absorbed by photodiodes, generate electron-hole pairs in a process called impact ionization which can result in a multiplication of charges when occurring in an electric field.

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Infrared sensors gain sensitivity with ultra-thin lens for fire and threat monitoring

Researchers have developed a highly sensitive method for detecting hotspots in the environment, such as bushfires or military threats, by harnessing the focusing power of meta-optical systems.

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Physicists achieve high precision in measuring strontium atoms using rubidium neighbor

Having good neighbors can be very valuable—even in the atomic world. A team of Amsterdam physicists was able to determine an important property of strontium atoms, a highly useful element for modern applications in atomic clocks and quantum computers, to unprecedented precision. To achieve this, they made clever use of a nearby cloud of rubidium […]

Calculating the spreading of fluids in porous materials to understand saltwater in soil

A solution to a tricky groundwater riddle from Australia: Researchers at TU Wien have developed numerical models to simulate the movement of fluids in porous materials.

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BWC: Suspect charges at Ore. officers with knife, injuring one before fatal OIS

The Eagle Point Police chief and an officer were speaking with a suspect before he became agitated, grabbed a knife and wounded the officer

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Texas governor offers $10K reward as suspect who shot officer, K-9 remains on the run

The suspect, wanted for wounding a Jacksonville police officer and K-9, has been added to the Texas 10 Most Wanted list

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BWC: Good Samaritan gives La. officer a lift to catch suspected shoplifter after foot pursuit

The Slidell officer hitched a ride with a bystander, who followed the suspect as she got in a vehicle to flee; the cop relayed information to colleagues, who arrested the suspects

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Want to find more supernovae? Follow the light

Is there anything more dramatic than an exploding star? More than just extraordinarily bright, energetic events that can light up the sky for months, these explosions play important roles in the cosmos. Supernovas create heavy elements and spread them out into their surroundings, where they can be taken up in the next round of planet […]