Archive for the ‘cosmology’ category: Page 169

Mar 1, 2020

Physicists model the supernovae that result from pulsating supergiants like Betelgeuse

Posted by in categories: cosmology, physics

Betelgeuse has been the center of significant media attention lately. The red supergiant is nearing the end of its life, and when a star over 10 times the mass of the Sun dies, it goes out in spectacular fashion. With its brightness recently dipping to the lowest point in the last hundred years, many space enthusiasts are excited that Betelgeuse may soon go supernova, exploding in a dazzling display that could be visible even in daylight.

While the famous star in Orion’s shoulder will likely meet its demise within the next million years—practically couple days in cosmic time—scientists maintain that its dimming is due to the star pulsating. The phenomenon is relatively common among red supergiants, and Betelgeuse has been known for decades to be in this group.

Coincidentally, researchers at UC Santa Barbara have already made predictions about the brightness of the supernova that would result when a pulsating star like Betelgeuse explodes.

Mar 1, 2020

Why is there any matter in the universe at all? New study sheds light

Posted by in categories: cosmology, particle physics

Scientists at the University of Sussex have measured a property of the neutron—a fundamental particle in the universe—more precisely than ever before. Their research is part of an investigation into why there is matter left over in the universe, that is, why all the antimatter created in the Big Bang didn’t just cancel out the matter.

The team—which included the Science and Technology Facilities Council’s (STFC) Rutherford Appleton Laboratory in the UK, the Paul Scherrer Institute (PSI) in Switzerland, and a number of other institutions—was looking into whether or not the neutron acts like an “electric compass.” Neutrons are believed to be slightly asymmetrical in shape, being slightly positive at one end and slightly negative at the other—a bit like the electrical equivalent of a bar magnet. This is the so-called “” (EDM), and is what the team was looking for.

This is an important piece of the puzzle in the mystery of why matter remains in the Universe, because scientific theories about why there is matter left over also predict that neutrons have the “electric compass” property, to a greater or lesser extent. Measuring it then it helps scientists to get closer to the truth about why matter remains.

Mar 1, 2020

Venn and the art of avoiding a parallel governance universe

Posted by in categories: cosmology, governance

Boards and management teams can easily find themselves either stepping on each other’s toes – or, conversely, functioning in parallel universes. So how do you find the perfect balance? Top tips on achieving a Venn-like state from Patrick Dunne – a serial social entrepreneur, chair of the EY foundation and the author of a new book on governance.

Feb 29, 2020

A Tiny, Lab-Size Wormhole Could Shatter Our Sense of Reality

Posted by in category: cosmology

How scientists plan to set up two black holes and a wormhole on an ordinary tabletop.

Feb 29, 2020

Parallel universes exist and we will soon explore them, physicist says

Posted by in categories: cosmology, particle physics, quantum physics

At a quantum level, the vanishingly tiny particles that make up the building blocks of everything don’t even have a set location, just a smear of possible positions dictated by complex rules of probability.

And theoretical physicist Sean Carroll is entirely happy with that. He says that the fact that tiny particles like electrons and photons don’t have one set place in the universe is evidence that there are many parallel universes.

Feb 29, 2020

Kaboom! Astronomers detect the universe’s biggest explosion since the Big Bang

Posted by in category: cosmology

Scientists have discovered the biggest explosion seen in the universe since the Big Bang, a new study reports. The explosion took place at the center of a galaxy that’s about 390 million light years from Earth.

“We’ve seen outbursts in the centers of galaxies before, but this one is really, really massive,” said study co-author Melanie Johnston-Hollitt of the International Centre for Radio Astronomy Research, in a statement. “And we don’t know why it’s so big.”

She added that the explosion happened very slowly, taking place over hundreds of millions of years. It also released five times more energy than the previous record holder.

Feb 29, 2020

Black Holes Are Nothing But Holograms, New Study Finds

Posted by in categories: cosmology, holograms, physics

Black holes are one of the most mysterious objects astronomer have encountered so far. And a new study proposes that black are nothing but just a holographic projection, with a new calculation of the entropy — or also known as disorder. These calculations suggest that these giant enigmas of the Universe being nothing but an optical illusion. Holograph hypothesis was first proposed by physicist Leonard Susskind back in the 1990s, according to this theory, mathematically speaking, the Universe requires just two dimensions — not three — for the laws of physics and gravity to work as they really should.

Feb 27, 2020

Astronomers detect biggest explosion in the history of the Universe

Posted by in category: cosmology

Scientists studying a distant galaxy cluster have discovered the biggest explosion seen in the Universe since the Big Bang.

Feb 27, 2020

Science Fact or Fiction: We Can Jump Between Parallel Universes

Posted by in categories: cosmology, futurism

Frequently used to change scenery in science fiction, parallel universes and the multiverse are indeed possible, but jumping from one to another might be a little tricky.

Feb 27, 2020

Wormholes Reveal a Way to Manipulate Black Hole Information in the Lab

Posted by in categories: cosmology, quantum physics

A proposal for building wormhole-connected black holes offers a way to probe the paradoxes of quantum information.