Table of Contents
What happened to the matter in the universe?
So yes, Andrej, matter particles are affected by the expansion of the Universe: they cool and lose energy. It took not only the radiation to drop in energy, but also the individual energies of the particles in the Universe to drop in kinetic energy to form the molecules, stars, galaxies and planets we see today.
Do particles cease to exist?
And since energy and matter are the same (thank Einstein for teaching us that E=mc2 thing), matter can also appear and disappear. At the quantum level, matter and antimatter particles are constantly popping into existence and popping back out, with an electron-positron pair here and a top quark-antiquark pair there.
What happened to all the anti particles also created?
This created a small surplus of matter, and as the universe cooled, all the antimatter was destroyed, or annihilated, by an equal amount of matter, leaving a tiny surplus of matter.
Why is there no particles in space?
Outer space is teaming with fields and particles, as depicted in this artistic rendering. Even a “perfect” vacuum would still hold vacuum energy, the Higgs field, and spacetime curvature. Space seems empty to humans because we can’t see most of the stuff there, and because there is much less air than we are used to.
Where did all matter come from?
Origins. In the first moments after the Big Bang, the universe was extremely hot and dense. As the universe cooled, conditions became just right to give rise to the building blocks of matter – the quarks and electrons of which we are all made.
What is it called when particles pop in and out of existence?
In quantum terms, the strong force is carried by a field of virtual particles called gluons, randomly popping into existence and disappearing again. The energy of these vacuum fluctuations has to be included in the total mass of the proton and neutron. But it has taken decades to work out the actual numbers.
Are virtual particles really constantly popping in and out of existence?
Virtual particles are indeed real particles. Quantum mechanics allows, and indeed requires, temporary violations of conservation of energy, so one particle can become a pair of heavier particles (the so-called virtual particles), which quickly rejoin into the original particle as if they had never been there.
Is empty space actually empty?
And as in the rest of physics, its nature has turned out to be mind-bendingly weird: Empty space is not really empty because nothing contains something, seething with energy and particles that flit into and out of existence. Physicists have known that much for decades, ever since the birth of quantum mechanics.
What is at the end of space?
Many think it’s likely you would just keep passing galaxies in every direction, forever. In that case, the universe would be infinite, with no end. Scientists now consider it unlikely the universe has an end – a region where the galaxies stop or where there would be a barrier of some kind marking the end of space.
Does nothingness exist?
There is no such thing as nothingness, and zero does not exist. Everything is something. Nothing is nothing.
What Cannot be created or destroyed?
The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. In other words, energy cannot be created or destroyed.