Fiery Image Shows Life and Death of Stars in Vela C

Two nebulous blue orbs stand out against a wispy red background in this image of the Vela C region.

Vela C is one of four regions in what is called the Vela Molecular Ridge, a vast complex of gas and dust located 2,300 light-years from Earth and weighing approximately 500,000 times the mass of our sun. Vela C contains more material than any other part of the molecular cloud.

This image, taken by the European Space Agency’s Herschel space observatory, shows off the delicate interplay between gravity and turbulence in Vela C. Gravitational attraction causes the gas and dust to clump, while random motions move the material around. Together, these forces create the beautiful filaments and delicate structures within the region. A long ridge can be seen winding its way through the center of Vela C, with many smaller strands branching away.

This interaction between gravity and turbulence triggers the formation of stars. When bunches of gas and dust grow large enough, they pull in more and more material, eventually leading to higher density and temperature, which ignites a nuclear furnace to power a star. While the turbulent motions counteract this tendency to clump, they can also sometimes push material into regions of high density, provoking more star formation.

In the image, tiny point-like specks can be seen embedded within the gaseous filaments. These are these high-density areas that will eventually become new stars.

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Inside Brooklyn’s DIY Spacesuit Startup

Images copyright of Dave Mosher (unless noted otherwise)

Traditional Sexual Values Challenged in Classic Animal Study

The idea that animal evolution is shaped by males boasting and fighting to win female favor is a central biological dogma.

Females pick males whose exaggerated traits suggest virility, thus producing peacock feathers and sage grouse struts. Males compete for female favor, hence a stag’s antlers and fights for territorial domination. These are the main engines of sexual selection, the default explanation for differences between the sexes.

Under closer scrutiny, however, the dogma doesn’t seem to hold. A new replication of English geneticist Angust Bateman’s foundational mid-20th century mate-choice study, a study that reinforced sexual selection assumptions and shaped decades of research, came to very different conclusions than the original.

Bateman’s refutation may be an exclamation point for critics who say the evolutionary dance between sexes is far richer and more complicated than a male-dominated two-step.

“Our expectations have been so strongly affected by Bateman,” said evolutionary biologist Patricia Gowaty of the University of California, Los Angeles, who led the study’s replication, published in June in Proceedings of the National Academy of Sciences. “It’s almost as though our imaginations were limited.”

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Physics Shows Batman’s Cape Is Suicide Machine

Image: Warner Bros, Inc.

By Liat Clark, Wired UK

Where would Bruce Wayne be without the batsuit’s ubiquitous slick cape? Alive and well, according to physicists at the University of Leicester, who have revealed that the impact of the hero’s plunge back to Earth after a little lofty cape-gliding would be the equivalent of being hit by a car at 50 mph.

Wired U.K.
The tragic findings, published in the university’s Journal of Special Physics Topics by four final-year masters students, conclude: “Clearly gliding using a batcape is not a safe way to travel, unless a method to rapidly slow down is used, such as a parachute.”

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South Pole Neutron Detectors Could Forecast Solar Storms

Image: NASA/SDO/@Camilla_SDO

By Duncan Geere, Wired UK

Solar storms are notoriously difficult to predict, but a new application of the South Pole’s neutron sensors could help humanity take shelter.

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These detectors are normally used to estimate the rate at which cosmic rays strike the Earth’s atmosphere, slam into the nuclei of the gas atoms floating around up there, and send the neutrons within spinning towards the surface.

However, a team of space physicists has spotted that they could also be used as an early warning system by detecting incoming protons from solar storms. They compared the detectors’ data with data collected from radiation sensors on an Earth-orbiting satellite during a series of particularly strong solar flares which occurred between 1989 and 2005, and found that they could predict the intensity of the storm.

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