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Collision between black hole and 'mysterious object' puzzles astronomers

A black hole and a neutron star collision
© Carl Knox/OzGrav ARC Centre of Excellence
GW190814: A black hole and a neutron star colliding, or something even more unusual
On Aug. 14, 2019, a gravitational wave -- a massive ripple through the fabric of space-time -- washed over the Earth. The wave was detected by sophisticated, fine-tuned lasers in the US and Italy. And it was astonishing. While the lasers had previously picked up black hole collisions and neutron star collisions, they were now suggesting something unprecedented: a black hole smashing into a neutron star.

The signal was one of the strongest ever seen by the gravitational wave scientists at the Laser Interferometer Gravitational-wave Observatory and Italy's Virgo observatory. After an alert was sent out moments after detection, teams of astronomers across the world turned their telescopes to the point in space that the wave emanated from.

Telescope

Understanding how Pluto can have liquid oceans so far from the sun

Pluto
© NASA/JHUAPL/SwRI
Pluto
It's only been in recent years - since the historic flyby of the New Horizons probe in 2015 - that we've been able to understand Pluto with any great depth or detail. We've learnt a lot about our Solar System's tiny outlier, but one of the biggest surprises was a number of hints that liquid oceans still slosh beneath Pluto's icy surface.

At an average distance of 5.9 billion kilometres (3.7 billion miles) from the Sun, in the frigid reaches of the Kuiper Belt, scientists had thought the dwarf planet must have been frozen solid - and exactly how liquid water could exist on such a cold object was a mystery.

Now astronomers have come up with a new scenario, detailed in a new paper - if Pluto formed quickly, the heat generated by this process could have been sufficient to keep subsurface oceans liquid for billions of years.

Galaxy

The singularity at the center of a black hole is as inescapable as expected

Black Hole
© Alain R
Simulation of the distortions in space time caused by a black hole.
For the first time, physicists have calculated exactly what kind of singularity lies at the center of a realistic black hole.

In January 1916, Karl Schwarzschild, a German physicist who was stationed as a soldier on the eastern front, produced the first exact solution to the equations of general relativity, Albert Einstein's radical, two-month-old theory of gravity. General relativity portrayed gravity not as an attractive force, as it had long been understood, but rather as the effect of curved space and time. Schwarzschild's solution revealed the curvature of space-time around a stationary ball of matter.

Curiously, Schwarzschild noticed that if this matter were confined within a small enough radius, there would be a point of infinite curvature and density — a "singularity" — at the center.

Pi

Bits and Bytes at the Bottom

abstract light
© Michael Dziedzic via Unsplash.
Scientific materialism is an atheistic worldview that sees all reality as the result of accidental collisions and combinations of elementary particles governed by a mysteriously fortuitous set of laws that control how matter interacts. It's a worldview devoid of higher meaning and purpose.

Today, scientific materialism has captured much of the academic world. Science itself has virtually come to be defined as the study of this mechanical, robotic, meaningless, accidental combination of particles of matter and energy. Any belief in design, purpose, ultimate meaning, inherent values, morality, or beauty is ridiculed as equivalent to belief in the Easter Bunny.

Although scientific materialists in the last century didn't usually pretend to have all the answers, most did express confidence that it was only a matter of time before any shortcomings in their paradigm would be shored up by fresh discoveries.

But a funny thing happened on the way to the 21st century.

It from Bit

The computer revolution and information age, combined with advances in microscopy and theoretical physics, have transformed our understanding of the power of information processing and opened our eyes to the deep structures of physical reality. The central insight: the essence of the physical world is energy and information. There is no such thing as mere "solid" matter. Instead, the substructure of physical reality is an unbelievably complex network of interlocking information-processing systems all working in harmony to afford progressively more capable information-processing systems.

Fireball 2

Newly detected chi Phoenicids meteor shower

The ongoing night-time video surveillance of the night sky called "CAMS" has discovered a meteor shower caused by yet another unknown long-period comet that passed close to Earth's orbit in a past return. SETI Institute meteor astronomer Peter Jenniskens reports that this shower was briefly seen on June 10 by southern hemisphere networks of the CAMS project in New Zealand, Namibia and Chile (see the map for June 10 at this project website.
New Meteor Shower
© CAMS
The meteoroid stream is unusual in that its orbit is nearly exactly perpendicular to the plane of the planets, having an inclination of 90.2 +/- 1.0 degrees. The shower has received the name "chi Phoenicids" and has been added as number 1036 to the list of meteor shower names maintained by the International Astronomical Union. A telegram announcing the discovery (CBET 4798) was issued today.

Galaxy

The Universe: A cosmic dashboard with no objective physical world

Blue square thingy
© Getty Images
Relational quantum mechanics suggests physics might be a science of perceptions, not observer-independent reality.
One of the weirdest theoretical implications of quantum mechanics is that different observers can give different — though equally valid — accounts of the same sequence of events. As highlighted by physicist Carlo Rovelli in his relational quantum mechanics (RQM), this means that there should be no absolute, observer-independent physical quantities. All physical quantities — the whole physical universe — must be relative to the observer. The notion that we all share the same physical environment must, therefore, be an illusion.

Such a counterintuitive prediction — which seems to flirt dangerously with solipsism — has been clamoring for experimental verification for decades. But only recently has technology advanced far enough to allow for it. So now, at last, Massimiliano Proietti and collaborators at Heriot-Watt University, in the U.K., seem to have confirmed RQM; as predicted by quantum mechanics, there may well be no objective physical world.

Yet, our perceptions of the world beyond ourselves are quite consistent across observers: if you were to sit next to me right now, we would describe my study in very similar, mutually consistent ways. Clearly, observers must share an environment of some sort, even if such an environment is not physical — i.e., not describable by physical quantities.

Radar

One-fifth of Earth's ocean floor is now mapped

map ocean
© Nippon Foundation-GEBCO Seabed 2030 Project
The black is where we still need modern measurements at a reasonable resolution
We've just become a little less ignorant about Planet Earth.

The initiative that seeks to galvanise the creation of a full map of the ocean floor says one-fifth of this task has now been completed.

When the Nippon Foundation-GEBCO Seabed 2030 Project was launched in 2017, only 6% of the global ocean bottom had been surveyed to what might be called modern standards.

That number now stands at 19%, up from 15% in just the last year.

Some 14.5 million sq km of new bathymetric (depth) data was included in the GEBCO grid in 2019 - an area equivalent to almost twice that of Australia.

Comment: See also:


Nebula

Unexplained signal appears in hunt for dark matter

Xenon1T
An experiment searching for signs of elusive dark matter has detected an unexplained signal.

Scientists working on the Xenon1T experiment have detected more activity within their detector than they would otherwise expect.

This "excess of events" could point to the existence of hypothesised particles called axions, some of which are candidates for dark matter.

Dark matter comprises 85% of matter in the cosmos, but its nature is unknown.

Comment: See also: And check out SOTT radio's:


Comet 2

You thought asteroids were bad? ESA warns COMETS may do far 'MORE DAMAGE' if they hit Earth

Churyumov–Gerasimenko comet
© ESA
Churyumov–Gerasimenko comet
Comets are not harbingers of doom, just harmless lumps of ice that produce majestic sky displays when passing the Sun, right? Not according to the European Space Agency, which has warned of their deadly capabilities.

A comet is "likely to cause more damage than an average asteroid of the same size," the agency says - despite the fact that comets tend to weigh less than asteroids of similar size because the material they are made of is less dense.

This tidbit of alarming knowledge comes ahead of Asteroid Day later this month, as the ESA tries to raise public awareness of the dangers space may pose to Earth.

Evil Rays

Ericsson increases forecast for global 5G subscriptions, 2.8 billion by 2025

ericsson
The June 2020 edition of the Ericsson Mobility Report proved to be somewhat unique as it included an evaluation of how the COVID-19 pandemic impacted the communications industry. The report concluded that the past few months have seen "a rapid shift of network traffic from business to residential areas" and "that mobile and fixed networks are increasingly playing a bigger part of critical national infrastructure."

Despite the unexpected events of 2020, however, 5G deployment and adoption is still strong, with 190 million 5G subscriptions forecast by end of 2020, and 2.8 billion by the end of 2025, according to Ericsson. The report results actually encouraged Ericsson to increase its year-end 2020 forecast for global 5G subscriptions.

"Beyond measuring the success of 5G in subscriptions, its impact ultimately will be judged by the benefits it brings to people and enterprises," commented Fredrik Jejdling, EVP and head of networks at Ericsson. "5G was made for innovation and this crisis has highlighted the true value of connectivity and the role it can play in restarting economies."

Comment: Ironically, installing 5G in an attempt to avoid putting self in danger of contracting an illness may in fact hasten a deterioration in one's health and increase one's susceptibility to a real outbreak. For more on the risks, check out SOTT radio's: Objective:Health #15 - The Dangers of 5G & WiFi - With Scott Ogrin of Scottie's Tech.Info