For almost a century, physicists have claimed that most of the matter in our universe cannot be seen – which is called dark matter. Furthermore, they’ve observed the existence of a mysterious dark energy that makes the story even more intriguing. And it led to even more fascinating questions about dark matter.
Needless to say, both of these theories have sparked many debates regarding how forces behave in our universe and how the stars in galaxies continue to move. One thing’s for sure, the universe has been expanding. And the rate of expansion is accelerating as well.
One study in particular has shed some interesting light on these astronomical puzzles.
History of Dark Matter
It was in 1933 when a Swiss cosmologist named Fritz Zwicky drew a conclusion that literally stunned the science world. He was the one who first postulated that there’s more matter in the universe than can be seen or observed. And the matter that can’t be seen is dark matter. The concept stewed for a while before it gained more prominence.
Than in 1970, a United States astronomer named Vera Rubin outlined speed and movements of the stars. This led to scientists discovering new and different resources to hopefully identify dark matter – more specifically they could attempt to find it on the ground, in outer space, and even at CERN. Yet none of these would prove successful.
Throughout the decades since that time, an incredible amount of resources have been expended and implemented. Despite this, no observation has ever been made in identifying or confirming the existence of dark matter or dark energy.
Even more amazing is that dark energy is supposedly stronger than Isaac Newton’s gravitational attraction. Thus, dark matter and dark energy remain as only mysterious concepts.
Current model of the Universe
The current view of the universe and its components are described by three fundamental treatments of physics. Those are: 1) Newton’s universal gravitation, 2) Einstein’s equations of general relativity, and 3) Quantum Mechanics. These models are based on the occurrence of a big bang followed by rapid expansion immediately afterwards.
However, this existing model doesn’t account for conditions prior to the big bang. It is assumed to be empty space, but no one knows it properties. Even more importantly, how did the properties of this empty space react to the event itself? No one knows.
Many scientists point out that Einstein’s view of unfilled space contains a cosmological constant that perhaps deal with the empty space concept. In fact, current models of the universe model assume this.
As physicists examined this model further, they also concluded that the scale invariance of an empty space is also exists in the basic theory of electromagnetism.
As they tested the model further, scientists learned that it predicts an accelerated expansion of the universe without the need for including dark matter or dark energy. This brings into question whether or not dark matter and dark energy even exist at all.
It could be that this universal acceleration of the expansion is already present in equations of fundamental physics.
Stay tuned for even more debates and ideas from the world of physics.