A proposed theory of gravity does away with dark matter, even as new astrophysical findings challenge the need for galaxies full of the invisible mystery particles.
Category: cosmology – Page 442
Why the US Is Losing Ground on the Next Generation of Powerful Supercomputers
“I feel the need — the need for speed.”
The tagline from the 1980s movie Top Gun could be seen as the mantra for the high-performance computing system world these days. The next milestone in the endless race to build faster and faster machines has become embodied in standing up the first exascale supercomputer.
Exascale might sound like an alternative universe in a science fiction movie, and judging by all the hype, one could be forgiven for thinking that an exascale supercomputer might be capable of opening up wormholes in the multiverse (if you subscribe to that particular cosmological theory). In reality, exascale computing is at once more prosaic — a really, really fast computer — and packs the potential to change how we simulate, model and predict life, the universe and pretty much everything.
NA64 hunts the mysterious dark photon
One of the biggest puzzles in physics is that eighty-five percent of the matter in our universe is “dark”: it does not interact with the photons of the conventional electromagnetic force and is therefore invisible to our eyes and telescopes. Although the composition and origin of dark matter are a mystery, we know it exists because astronomers observe its gravitational pull on ordinary visible matter such as stars and galaxies.
Some theories suggest that, in addition to gravity, dark matter particles could interact with visible matter through a new force, which has so far escaped detection. Just as the electromagnetic force is carried by the photon, this dark force is thought to be transmitted by a particle called “dark” photon which is predicted to act as a mediator between visible and dark matter.
“To use a metaphor, an otherwise impossible dialogue between two people not speaking the same language (visible and dark matter) can be enabled by a mediator (the dark photon), who understands one language and speaks the other one,” explains Sergei Gninenko, spokesperson for the NA64 collaboration.
Stephen Hawking: Humans will die out within 1,000 years unless we leave Earth
Professor Stephen Hawking has warned that mankind will not survive another millenia unless it makes a home beyond Earth’s atmosphere.
The celebrated physicist was addressing a lecture audience at the Oxford Union debating society on Monday evening when he gave the stark warning.
“Most recent advances in cosmology have been achieved from space where there are uninterrupted views of our Universe,” he said “but we must also continue to go into space for the future of humanity.
Wormhole entanglement solves black hole paradox
EMN is a world-class collective of award-winning journalists and researchers whose mission is to be the leading online live streaming news network for alternative news and information. This news and research-driven force will be the recognized source for inquiring minds. From the paranormal to the supernormal, inner space to outer space, whether groundbreaking scientific discoveries or research into the world of the unexplained; EMN is the gateway for inquiring minds uniting a formidable community of truth-seekers worldwide led by the most respected industry leaders committed to the highest level of integrity.
