This was great discovery because not only did physicists demonstrate that space-time cannot be locally flat at a point where two shock waves collide,
but it was also the beginning o what is now called " new kind of singularity in general relativity."
Now, after studying the tracings of three photons of differing wavelengths that were recorded by NASA's Fermi Gamma-ray Space Telescope in May 2009,
scientists have made a new surprising discovery that suggests space-time is not a bubbly as previously thought.
The photons originated about 7 billion light years away from Earth in one of three pulses from a gamma-ray burst. They arrived at the orbiting
telescope just one millisecond apart, in a virtual tie.
Gamma-ray bursts are short-lived bursts of gamma-ray photons, the most energetic form of light.
They can originate far across the universe, and astronomers believe many are caused by giant stars collapsing, often billions of years before Earth was formed.
"Gamma-ray bursts can tell us some very interesting things about the universe," physicist Robert Nemiroff of Michigan Technological University said.
The three photons recorded by the Fermi telescope suggest that space-time may not be not as bubbly as some scientists think.
Some theories of quantum gravity say that the universe is not smooth but foamy -- made of fundamental units called Planck lengths that are less than a
trillionth of a trillionth the diameter of a hydrogen atom.
Planck lengths are so small that there's no way to detect them, except via photons like those that make up gamma-ray bursts.
Scientists have discovered space-time is not as bubbly as they previosuly thought.
Here's why. The wavelengths of these photons are some of the shortest distances known to science -- so short they should interact with the even
smaller Planck length. And if they interact, the photons should be dispersed -- scattered -- on their trek through Planck length-pixelated spacetime.
In particular, they should disperse in different ways if their wavelengths differ, just as a ping pong ball and a softball might take alternate
paths down a gravely hillside.
You wouldn't notice the scattering over short distances, but across billions of light years, the Planck lengths should disperse the light. And
three photons from the same gamma-ray burst should not have crashed through the Fermi telescope at the same moment.
But they did, and that calls into question just how foamy spacetime really is. "We have shown that the universe is smooth across the Planck mass,"
Nemiroff said. "That means that there's no choppiness that's detectable. It's a really cool discovery. We're very excited."
Space-Time Crystal Computer That Can Outlive Even The Universe Itself!
It may seem strange to think something can survive even the death of the Universe,
but that could actually be possible as a result of the laws of quantum physics.
Scientists are now suggesting a new blueprint for a device, known as a time crystal, that can
theoretically continue to function as a computer even after the universe cools to absolute zero.
Physicists Challenge Validity Of Big Bang Theory
We all know that the Big Bang theory is an effort to explain what happened at the very beginning of our universe.
However, Australian team of theoretical physicists at the University of Melbourne and RMIT University say that it's time to change our understanding of this process.