The Quantum Foam speaks

The Quantum Foam speaks as scientists have now discovered ongoing gravitational waves, generated by massive celestial objects like black holes, roiling the QF fabric of reality 24/7. 

NANOGrav can’t yet make out individual gravitational wave sources. Instead, the team has found evidence for the background hum of all low-frequency gravitational waves. It’s like a buoy bouncing up and down in a busy harbor — it can’t distinguish the wake of a single boat, but its motion can reveal that there are some big objects slicing through the water.

Objects of greater mass produce gravitational waves of lower frequency. For example, the most massive celestial body in the universe, the supermassive black hole binaries (with 100 million to 100 billion times the solar mass) in the center of galaxies, mainly generate gravitational waves in the nanohertz band, with corresponding signal time scales from years to decades. This frequency band also includes gravitational wave contributions from processes of the early universe as well as exotic objects such as cosmic strings.

In Einstein’s reimagined universe, space is not serenely empty, and time does not march smoothly forward. Instead, the powerful gravitational interactions of massive objects — including supermassive black holes — regularly ripple the fabric of space and time. The picture that emerges is a universe that looks like a choppy sea, churned by violent events that happened over the course of the past 13 billion-plus years.

At base level, Quantum Foam is reality ...

Thus, at the tiny quantum level, empty space isn’t empty. It’s actually a vibrant place, with tiny subatomic particles appearing and disappearing in wanton abandon. This appearance and disappearance has some superficial resemblance to the effervescent behavior of the foam on the top of a freshly poured beer, with bubbles appearing and disappearing — hence the term “quantum foam.”

Proof positive - Nothing is not nothing at all. :)

Another demonstration of the quantum foam comes courtesy of the Casimir Effect, named after Dutch physicist Hendrik Casimir. The effect goes something like this: Take two metal plates and put them very near one another in a perfect vacuum, separated by a tiny fraction of a millimeter. If the quantum foam idea is right, then the vacuum surrounding the plates is filled with an unseen flurry of subatomic particles blinking into and out of existence.

Scientists made several measurements of the Casimir effect, however it was in 2001 when the effect was conclusively demonstrated using the geometry I have described here. The pressure due to the quantum foam causes the plates to move. The quantum foam is real. Nothing is something after all.

Bubbling up. In this artist’s impression, spacetime at the Planck scale is a quantum foam. A new analysis suggests that even though this foam may have an enormous energy, it can still resemble a zero-energy vacuum on large scales.

Quantum fluctuations or the lack of nothingness rules ... forever. :)

Addendum: 

Such gravitational waves are distinct from the kinds that were previously reported from the Laser Interferometer Gravitational-Wave Observatory (LIGO) and other Earth-based detectors. For one thing, the waves spotted via pulsars wouldn’t all be traceable to individual merger events: they would form the so-called gravitational-wave background, the ambient rustling of spacetime built up from cumulative mergers throughout the cosmos. Another important distinction is that in their crest-to-trough span, each of these waves should be approximately the size of our solar system—which counterintuitively makes them much harder to detect. Washing over pulsar-strewn space, these gargantuan swells in spacetime could betray their presence via minuscule offsets to the dead stars’ spins, allowing observers to glimpse them through painstaking measurements. In a collection of five papers released today, that is essentially what NANOGrav claims to have done.