Tuesday, September 20, 2022

DETERMINE THE AGE OF A SUPERNOVA REMNANT

SNR 0519 is the remnant of a white dwarf that blew up after exceeding its critical mass limit. There are several mechanisms through which a white dwarf accumulates mass, such as a collision with another white dwarf or a mass transfer from a companion star into a binary system. Whatever the process, the end result is the explosion and destruction of the white dwarf.

Is dark matter real? Astronomy’s multi-decade mystery

Modern astronomy is in a bit of turmoil. Astronomers understand how stars form, burn, and die, and they are improving their understanding of how planets assemble themselves into planetary systems like our own.

But astronomers have a problem: They don’t understand how galaxies can exist — a problem that has remained unsolved after decades of research.

Wednesday, September 14, 2022

70-year-old quantum prediction comes true, as something is created from nothing

An international research team led by The University of Manchester has succeeded in observing the so-called Schwinger effect, an elusive process that normally occurs only in cosmic events. By applying high currents through specially designed graphene-based devices, the team - based at the National Graphene Institute - succeeded in producing particle-antiparticle pairs from a vacuum.

Tuesday, September 13, 2022

THE DOUBLE QUASAR, THE FIRST GRAVITATIONAL LENS TO BE OBSERVED

Looking at this stellar field there doesn’t seem to be anything special, some stars of the Milky Way in the first and a large number of galaxies very distant in space. In fact, despite their appearance, the two very bright objects located at the center of the image are not stars, but quasars, active galactic nuclei extremely bright and distant from Earth.

Quantum batteries: Strange technology that could provide instant power

By leveraging a bizarre property of quantum mechanics called entanglement, quantum batteries could theoretically recharge in a flash. Now, progress is being made towards making them a reality.

Monday, September 12, 2022

Far-infrared detector KID reaches highest possible sensitivity

Astronomy has a blind spot in the area of far-infrared radiation compared to most other wavelengths. A far-infrared space telescope can only utilize its full sensitivity with an actively cooled mirror at temperatures below 4 Kelvin (-269 ℃). Such a telescope doesn't exist yet, which is why there has been little worldwide investment in the development of corresponding detectors.

Tuesday, September 6, 2022

What are the gravitational waves?

Gravitational waves are 'ripples' in space-time caused by some of the most v
iolent and energetic processes in the Universe.
Albert Einstein predicted the existence of gravitational waves in 1916 in his general theory of relativity. Einstein's mathematics showed that massive accelerating objects (such as neutron stars or black holes orbiting each other) would disrupt space-time in such a way that 'waves' of undulating space-time would propagate in all directions away from the source. These cosmic ripples would travel at the speed of light, carrying with them information about their origins, as well as clues to the nature of gravity itself.

Sunday, September 4, 2022

The human brain builds structures in 11 dimensions, discover scientists

The brain’s incredible complexity continues to amaze us. When our brain analyzes information, it generates neural structures with up to 11 dimensions, according to groundbreaking study that combines neuroscience and math.

They mean abstract mathematical spaces, not other physical realms, when they say “dimensions.” Nonetheless, the researchers “discovered a world we had never imagined,” according to Henry Markram, director of the Blue Brain Project, which made the finding.