Physics

How astronomers learned to ‘listen’ to gravitational waves

Since confirming the existence of ripples in the fabric of space-time some five years ago, the LIGO/Virgo collaboration has advanced gravitational-wave research by leaps and bounds.

Vanguard 1: Earth’s Oldest Artificial Satellite That's Still in Orbit

America’s second satellite stopped communicating with Earth in 1964, but it will stay in orbit for centuries.

Topological materials 'cherned' up to the maximum

In topological materials, electrons can display behavior that is fundamentally different from that in 'conventional' matter, and the magnitude of many such 'exotic' phenomena is directly proportional to an entity known as the Chern number. New experiments establish for the first time that the theoretically predicted maximum Chern number can be reached -- and controlled -- in a real material.

Cosmic cataclysm allows precise test of general relativity

In 2019, the MAGIC telescopes detected the first Gamma Ray Burst at very high energies. This was the most intense gamma-radiation ever obtained from such a cosmic object. But the GRB data have more to offer: with further analyses, the MAGIC scientists could now confirm that the speed of light is constant in vacuum—and not dependent on energy. So, like many other tests, GRB data also corroborate Einstein's theory of General Relativity. The study has now been published in Physical Review Letters.

The darkness at the end of the tunnel

The Cage, as the elevator is called, leaves at exactly 7:30 a.m. Latecomers are out of luck.

CERN: The first accelerators are back in action

The CERN Control Centre is back in shift work mode, with walls of screens showing the status of the beams, and coffee flowing freely day and night. On Friday, 3 July, the Long Shutdown 2 accelerator coordination team handed over the key of the PS Booster to the accelerator operators. Linac 4 and the PS Booster thus become the first two accelerators to be recommissioned, 18 months after the start of LS2.

CERN: physicists report the discovery of unique new particle

The LHCb collaboration at CERN has announced the discovery of a new exotic particle: a so-called "tetraquark". The paper by more than 800 authors is yet to be evaluated by other scientists in a process called "peer review", but has been presented at a seminar. It also meets the usual statistical threshold for claiming the discovery of a new particle.

Scientists dive deep into hidden world of quantum states

A research team led by the Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) has developed a technique that could lead to new electronic materials that surpass the limitations imposed by Moore's Law, which predicted in 1975 that the number of transistors packed into a tiny silicon-based computer chip would double every two years. Their findings were reported in the journal Nature Communications.

Calculating the true pressure required to propel penguin feces

A pair of researchers, one with Kochi University, the other Katsurahama Aquarium, both in Japan, has refined the estimate of the amount of pressure required by an Adélie penguin to shoot its feces a necessary distance. Hiroyuki Tajima and Fumiya Fujisawa have written a paper describing their new calculations and what it could mean for zookeepers.

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