The concept of dark matter and dark energy reveals that the visible universe is just a small fraction of the total cosmic energy budget from "summary" of The God Equation by Michio Kaku
Dark matter and dark energy are two mysterious components that make up the vast majority of the universe's energy budget. While visible matter, such as stars and galaxies, makes up only about 5% of the total energy content of the cosmos, dark matter and dark energy account for the remaining 95%. This revelation has profound implications for our understanding of the universe and the forces that govern it.
Dark matter, for example, is believed to be a form of matter that does not interact with light or other forms of electromagnetic radiation. It exerts gravitational forces on visible matter, holding galaxies together and influencing the large-scale structure of the universe. Despite its significant presence, dark matter remains elusive and has yet to be directly observed.
On the other hand, dark energy is thought to be a mysterious force that is causing the universe to expand at an accelerating rate. This discovery, based on observations of distant supernovae, has challenged our previous understanding of the universe's fate. Instead of a universe that slows down and eventually collapses due to gravity, we now have a picture of a universe that is expanding at an ever-increasing rate, driven by an unknown force.
The existence of dark matter and dark energy raises fundamental questions about the nature of the universe and the laws of physics that govern it. While we have made great strides in understanding the visible universe, these invisible components remind us that there is still much we do not know. The search for dark matter and dark energy continues to be a top priority for physicists and astronomers, as unlocking their secrets could hold the key to understanding the ultimate fate of the cosmos.
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