[ad_1]
Black energy is an enigmatic phenomenon that acts in opposition to gravity and is responsible for accelerating the expansion of the universe. Although the dark energy constitutes three quarters from the mass-energy of the cosmos, its underlying nature continues to elude physicists. Black energy has no real connection with dark matter, other than talking about the dark word, which simply means that scientists do not really know what it is.
Who discovered black energy?
The American astronomer Edwin Hubble realized that the universe was expanding and had noticed, in 1929, that the further a galaxy is from Earth, the faster it gets away from us. Hubble Space Telescope Site. This does not mean that our planet is the center of the universe, but rather that everything in the space away from everything else at a constant pace.
Nearly 60 years after Hubble's revelation, scientists have made another surprising discovery. Researchers have long been trying to accurately measure cosmic distances by looking at the light of distant stars. In the late 1990s, after examining distant supernovas, two independent teams found that the light from stellar explosions was weaker than expected. This indicates that the universe is not only expanding, but also accelerating.
This discovery has given physicists the reason to scratch their heads since then, also gaining its discoverers the Nobel Prize for physics in 2011.
What does black energy do?
Although researchers do not fully understand dark energy, they have used their knowledge of the phenomenon. build models from the universe that explain everything from the Big Bang to the modern large-scale structure of galaxies. Some of these models predict that dark energy will rip all that exists in billions of years from now.
The main explanation of black energy suggests that it is a type of pent-up energy inherent in the tissue of space-time. "This simple model works very well in practice and is a simple addition to the cosmological model without having to change the law of gravity," said Baojiu Li, a physicist mathematician at the University of Durham, UK. previously said Live Science. But the idea poses a major problem: physicists predict that the value of vacuum energy should be 120 orders of magnitude greater than that observed by cosmologists, Li said.
According to another idea, dark energy is an additional fundamental force, joining the four forces already known (gravity, electromagnetism and strong and weak nuclear forces). But this assumption does not explain why humans do not notice this extra strength in our daily lives. Thus, theorists have also constructed creative models suggesting that this mysterious force is hidden in one way or another.
The measured value of black energy is currently the subject of intense debate between rival factions of physics. Some researchers measured the power of dark energy using cosmic microwave background noise, a weak echo of the Big Bang, and produced an estimate.
But other astronomers, who measure the strength of dark energy with the help of light from distant cosmic objects, have produced a different value and no one has yet been able to explain the difference. Some experts have suggested that the power of dark energy varies over time, although proponents of this idea have not yet convinced this majority of their peers.
Additional resources:
[ad_2]
Source link