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Category: materials – Page 232
“It was a beautiful fireball”: Japan space capsule carrying astroid samples lands in Australia
It’s only the second time pristine astroid material has been brought back to Earth.
A Japanese space capsule carrying asteroid samples landed in a remote area of Australia as planned Saturday, Japan’s space agency, JAXA, said.
Why it matters via Axios’ Miriam Kramer: It’s only the second time pristine asteroid material has been brought back to Earth. Sample return missions like this one are incredibly valuable to scientists.
JAXA’s Hayabusa2 asteroid sample return capsule lands in Australia
Hayabusa2’s sample return capsule has landed in Woomera, Australia, today, 5 December — or 6 December local time at Woomera. The exact landing location is now being determined, but a tweet from the mission’s official account says an estimated location of landing has been identified and teams are en route to recover it.
The craft returned not just asteroid surface material, but subsurface material (at first) as well, and will be met by Japanese scientists after completing its six-year mission to the asteroid 162173 Ryugu.
The main Hayabusa2 spacecraft meanwhile used its remaining propellant to start an extended, 11 year astronomical mission.
Room Temperature Superconductors Will Change Everything
From ultra high speed levitating trains to lifesaving MRI machines, superconductors are key to some of the world’s most cutting edge technology. But they require extremely low temperatures to work and have remained too expensive for everyday use. Now that could be about to change. With superconductors that work at room temperature, our technological ability is posed to make a giant leap forward.
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How to make Tesla Tower at home
Transmit Electricity wirelessly and surprise everyone. Make your own Tesla tower to transmit power wireless. The tower uses a tesla coil that is based on the concept of Electromagnetic force and resonance to transmit energy.
However, it doesn’t actually transmit electricity, all it does is excite the electrons on the walls of fluorescent or neon lights to make them glow.
For principle of operation and material links visit:
https://www.instructables.com/id/How-to-Make-a-Mini-Tesla-Tower/
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Physicists Observe Trippy ‘Vortex Rings’ in a Magnetic Material For The First Time
Wherever you have fluid, there you can also find vortex rings.
Now, scientists have found vortex rings somewhere fascinating — inside a tiny pillar made of a magnetic material, the gadolinium-cobalt intermetallic compound GdCo2.
If you’ve seen smoke rings, or bubble rings under water, you’ve seen vortex rings: doughnut-shaped vortices that form when fluid flows back on itself after being forced through a hole.
Direct Visualization of Quantum Dots Reveals Shape of Quantum Wave Function of the Trapped Electrons
Researchers used a scanning tunneling microscope to visualize quantum dots in bilayer graphene, an important step toward quantum information technologies.
Trapping and controlling electrons in bilayer graphene quantum dots yields a promising platform for quantum information technologies. Researchers at UC Santa Cruz have now achieved the first direct visualization of quantum dots in bilayer graphene, revealing the shape of the quantum wave function of the trapped electrons.
The results, published on November 23, 2020, in Nano Letters, provide important fundamental knowledge needed to develop quantum information technologies based on bilayer graphene quantum dots.
Hubble Captures a Black Hole’s ‘Shadow Beams’, Yawning Across Space
In images from the Hubble Space Telescope, scientists have spotted an entirely new phenomenon. Reaching tens of thousands of light-years into the void of space, vast shadows stretch from the centre of the galaxy IC 5063, as though something is blocking the bright light from therein.
You’ve probably seen something very like it before – bright beams from the Sun when it’s just below the horizon and clouds or mountains only partially block its light, known as crepuscular rays. According to astronomers, the shadows from IC 5063 could be something very similar. They’re just a whole lot bigger – at least 36,000 light-years in each direction.
IC 5063, a galaxy 156 million light-years away, is a Seyfert galaxy. This means it has an active nucleus; the supermassive black hole at its centre is busily guzzling down material from a dense accretion disc and torus of dust and gas around it.
Decades Old Mystery Solved: A “New Kind of Electrons”
Why do certain materials emit electrons with a very specific energy? This has been a mystery for decades — scientists at TU Wien have found an answer.
It is something quite common in physics: electrons leave a certain material, they fly away and then they are measured. Some materials emit electrons, when they are irradiated with light. These electrons are then called “photoelectrons.” In materials research, so-called “Auger electrons” also play an important role — they can be emitted by atoms if an electron is first removed from one of the inner electron shells. But now scientists at TU Wien (Vienna) have succeeded in explaining a completely different type of electron emission, which can occur in carbon materials such as graphite. This electron emission had been known for about 50 years, but its cause was still unclear.
Strange electrons without explanation.