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Showing posts from March, 2018

A Galaxy Without Dark Matter

Update:  The study's authors have provided us with a link to a  free .pdf version of the full paper ! In a revolutionary development, a team of astronomers has discovered that a faint smudge of a galaxy called NGC1052-DF2 (or DF2, for short) may have no dark matter at all; the group's results show that DF2 has less dark matter than predicted by a factor of at least 400 . That’s a big deal. Astronomers have never seen a galaxy like this before, and it raises intriguing questions about galaxies and dark matter.

Meet the Undergrad Helping to Make Ultralight, High-Performance Metals a Reality

Adam Shaw is still working toward his degree, but he’s also working toward the creation of next-gen materials that could change the world of modern manufacturing. A senior at Harvey Mudd College in California, Shaw is part of an international team of physicists and materials scientists whose research could hold the key to making an entirely new class of durable, lightweight alloys—mixtures of metals that can crystallize together to be greater than the sum of their parts.

Helping Soldiers Disappear in a Burst of Smoke

When an imminent threat means troops need to move, sometimes the most powerful cover is a smokescreen. Not a figurative smokescreen, but an actual burst of smoke that hides soldiers—and even tanks—from enemy eyes. Commonly created by smoke grenades, these bursts are valuable only as long as the enemy can’t see through them.

Instruments of Wonder: As one observatory prepares to make history, another seeks to preserve it.

About two weeks ago, in the coastal town of Redondo Beach, California, engineers at the headquarters of Northrop Grumman Aerospace Systems unpacked one heck of a box. Transported via the Space Telescope Transporter for Air Road and Sea , the contents were unwrapped with extreme caution by workers sporting cleanroom bunny suits. Inside were intricate pieces of the James Webb Space Telescope (JWST) —the space-bound observatory expected to revolutionize our understanding of the universe over the next decade.

Physics society releases 55 previously paywalled Stephen Hawking papers

As long as his ideas continue to spread and inspire people, Hawking's mind will live on.

Want to Win? What physics has to say about teamwork

Even Michael Jordan needed teammates. Makeshift stands selling Bulls merchandise inhabited every corner of Chicagoland after “Air Jordan” led his team to their third straight championship in 1993—and all the stands were busy. People were caught up in the excitement and inspiration of watching Jordan, Pippen, Armstrong, Grant, and their teammates take on the world.

Edible Electronics? Lasers are Bringing "Super Material" Graphene to Everyday Surfaces

This may be the only photo you’ve ever seen of researchers proudly displaying a university-branded potato and coconut.

Quick Physics Fix: Why Metal Feels Colder

I want you to try something: Find an object nearby that's made of metal, and something else made of wood or plastic. Put a hand on each. Which one is colder?

Fighting Fire with Physics

On average, about 8 million acres of land burns each year from wildfires. Big fires can reduce forests and grasslands to ash and can destroy homes and lives. Sadly, up to 90 percent of wildland fires in the United States are caused by humans’ carelessness, like unattended campfires, burning trash or waste, tossed-out cigarettes, and arson. The remaining 10 percent are usually started by lightning. Controlling and fighting fires isn’t easy. But knowing the science behind a burning blaze helps firefighters tackle the heat and flames to help save property, land and lives.

A Step toward Computing at the Speed of Light

Researchers have come up with a blueprint for a small and tunable device that can control the flow of light. Because it’s much tinier than existing technology, the invention could help shrink optical equipment to the nanoscale, and even enable superfast computers that run on photons instead of electrons. The results will be published in the journal Physical Review Letters.