This article discusses a new study that challenges the existence of dark energy, a hypothetical form of energy that is thought to be responsible for the accelerating expansion of the universe. The study suggests that the universe may not be expanding uniformly in all directions, as is currently believed, but rather in a more “lumpy” or uneven way. This could explain the observed acceleration without the need for dark energy.
The study is based on an analysis of supernovae, which are exploding stars that can be used to measure distances and expansion rates in the universe. The researchers found that the light curves of supernovae, which show how their brightness changes over time, are more complex than previously thought. This complexity, they argue, could be due to the lumpy nature of the universe’s expansion.
If the study’s findings are correct, they could have major implications for our understanding of the universe. Dark energy is one of the biggest mysteries in cosmology, and its existence is still hotly debated. This new research could help to resolve the debate and provide a new framework for understanding the universe’s evolution.
However, it is important to note that the study is still preliminary and has not yet been independently verified. More research is needed to confirm the findings and to determine their implications for cosmology.
Yes, a new study suggests that dark energy might not exist and that the universe is expanding in a “lumpy” manner. This could mean that dark energy is not needed to explain the puzzling measurements of distant supernovae.
Dark energy is the mysterious force that speeds up the expansion of the universe. It’s thought to make up between 68% and 71% of all energy and matter in the universe. The most important evidence for dark energy’s existence comes from supernova redshifts, which were observed by Saul Perlmutter and Adam Riess and won them a Nobel Prize in 2011.
However, the new study suggests that the universe might be expanding in a “lumpy” manner, which could mean that dark energy is not needed to explain the measurements of distant supernovae.
Dark energy doesn’t exist and the universe is “lumpy” Dark energy has long been seen as the invisible force behind our Universe’s accelerating expansion. This mysterious component was thought to make up nearly 70 percent of the cosmic energy budget
What would happen if dark energy didn’t exist?
Without dark energy, we’d be somewhere in between[+] a decelerating and a coasting Universe. Image credit: NASA & ESA, of possible models of the expanding Universe. 4.) The Hubble rate of expansion would eventually drop to zero
What happens if dark matter doesn’t exist?
All galaxies are believed to be wrapped in an invisible halo of dark matter, and this envelope is vitally important; galaxies are rotating so rapidly, that without dark matter, they would have been torn apart long ago if they were held together only by the influence of their stars, gas, dust and planets
Why is 95% of the universe invisible?Surprisingly, normal matter turns out to be only a small fraction of what the Universe contains. 95% of the Universe is made up of dark matter and dark energy. These are words astronomers have come up with to give a name to the mysterious, invisible side of the Universe
dark matter real or fake?
In astronomy, dark matter is a hypothetical form of matter that does not interact with light or other electromagnetic radiation. Dark matter is implied by gravitational effects which cannot be explained by general relativity unless more matter is present than can be observed
antimatter real?
Antimatter is the twin of almost all the subatomic particles that make up our universe. The matter in our universe comes in many forms—solids, liquids, gasses, and plasmas. These forms of matter all consist of subatomic particles that give matter its mass and volume.
Can you touch dark matter?
What are dark matter and dark energy? There’s something amiss in the cosmos. Mysterious influences seem to be stretching the universe apart and clumping stuff together in unexpected ways, but we can’t see or touch them. Scientists call these influences dark energy and dark matter
Who discovered dark energy?
Dark energy was discovered in 1998 with this method by two international teams that included American astronomers Adam Riess (the author of this article) and Saul Perlmutter and Australian astronomer Brian Schmidt
Dark energy and expansion
For almost a century, scientists have assumed that the cosmos spreads out uniformly in every direction, with dark energy speeding up that expansion.
The notion was adopted after researchers saw exploding stars, known as supernovae, appearing farther away than expected.
When calculations showed that galaxies seemed to be drifting apart too quickly, dark energy became an easy placeholder for the unknown physics.
Professor David Wiltshire from the University of Canterbury in Christchurch, New Zealand has been examining this challenge in more detail.
His research team’s analysis of supernova light curves suggests the Universe may be more uneven than we assumed.
Their approach leads to a fresh explanation for the changes in light we see, one that focuses on how time passes differently in various gravitational conditions rather than appealing to an unseen substance
Enter the timescape model
The new work supports something called the timescape model, which does not need dark energy to explain cosmic acceleration. Instead, it notes that local physics can vary depending on how mass is distributed.
One clock drifting through a sparse region of the cosmos might tick faster than the same clock inside a galaxy packed with more gravitational pull.
Hubble tension and the lumpy Universe
Part of the growing dispute involves something called the Hubble tension.
Measurements of the early cosmos from the Cosmic Microwave Background suggest a certain rate of expansion, while observations of supernovae in the present day reveal a faster pace.
This inconsistency has triggered re-examinations of old assumptions. Adding to that, the Dark Energy Spectroscopic Instrument (DESI) has discovered that the standard ΛCDM model may not line up perfectly with some of its new high-precision data.
Researchers are looking into models where dark energy might change over time, but the timescape idea takes a different path: it challenges the uniformity assumption at its core
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