A new study revealed that dark matter does not exist in the universe, and it is around 27 billion years old. The study has challenged long-held ideas about the universe by proposing a model that does not require dark matter or dark energy, two concepts that have dominated modern cosmology for decades. An earlier study indicated that the universe is a mix of ordinary matter and two invisible components called dark matter and dark energy. The finding was discovered by Rajendra Gupta, a physics professor at the University of Ottawa, who has proposed a model that aims to explain the universe without dark matter or dark energy. He argued that familiar assumptions might be holding back progress. “The study’s findings confirm that our previous work (“JWST early universe observations and ΛCDM cosmology”) about the age of the universe being 26.7 billion years has allowed us to discover that the universe does not require dark matter to exist,” explains Gupta. Rajendra Gupta combines two ideas in his model: covarying coupling constants (CCC) and “tired light” (TL). The CCC concept questions whether fundamental constants, such as the strength of forces or the speed of light, might vary over time or across space, which could significantly alter our understanding of cosmic evolution, according to The Earth.com. The tired light theory offers an alternative explanation for redshift, suggesting that light from distant galaxies loses energy as it travels, causing it to shift toward the red end of the spectrum, rather than this effect being solely due to the expansion of the universe. Together, the CCC+TL framework aims to explain observed cosmic signals.<h3>Is dark matter real?</h3>The concept of dark matter emerged from observational anomalies rather than theory alone. In the 1930s, astronomer Fritz Zwicky observed that galaxy clusters were moving in ways that could not be explained by the mass visible to the telescope. Later findings indicated that galaxies rotate faster than expected at their edges than expected, suggesting the presence of additional unseen influence of gravity. Evidence from Gravitational lensing further supports the idea that there is more mass than what is directly observable. According to the standard cosmological model, dark matter is believed to account for roughly 27 per cent of the universe, while ordinary matter makes up less than 5 per cent. The remainder is attributed to dark energy, a theoretical force thought to be responsible for the universe’s accelerating expansion. This framework also places the universe’s age at around 13.8 billion years.<h3>Redshifts and cosmic observations</h3>A key focus of the study is redshift, the phenomenon where light stretches to longer wavelengths as it travels. The analysis compares galaxy distributions at lower redshifts with those from the early universe at higher redshifts. It suggests that these observations can be explained using the CCC+TL model, without the need to include dark matter in the calculations. “There are several papers that question the existence of dark matter, but mine is the first one, to my knowledge, that eliminates its cosmological existence while being consistent with key cosmological observations that we have had time to confirm,” Gupta concluded.&nbsp;Also read: <a href="https://www.wionews.com/trending/why-donald-trump-supporters-back-him-according-to-science-1776240467586">For Trump supporters, delulu is the only solulu - Science reveals why they back him, no matter what</a>&nbsp;

The finding was discovered by Rajendra Gupta, a physics professor at the University of Ottawa, who has proposed a model that aims to explain the universe without dark matter or dark energy.

A new study revealed that dark matter does not exist in the universe, and it is around 27 billion years old. The study has challenged long-held ideas about the universe by proposing a model that does not require dark matter or dark energy, two concepts that have dominated modern cosmology for decades. An earlier study indicated that the universe is a mix of ordinary matter and two invisible components called dark matter and dark energy. The finding was discovered by Rajendra Gupta, a physics professor at the University of Ottawa, who has proposed a model that aims to explain the universe without dark matter or dark energy. He argued that familiar assumptions might be holding back progress. “The study’s findings confirm that our previous work (“JWST early universe observations and ΛCDM cosmology”) about the age of the universe being 26.7 billion years has allowed us to discover that the universe does not require dark matter to exist,” explains Gupta. Rajendra Gupta combines two ideas in his model: covarying coupling constants (CCC) and “tired light” (TL). The CCC concept questions whether fundamental constants, such as the strength of forces or the speed of light, might vary over time or across space, which could significantly alter our understanding of cosmic evolution, according to The Earth.com. The tired light theory offers an alternative explanation for redshift, suggesting that light from distant galaxies loses energy as it travels, causing it to shift toward the red end of the spectrum, rather than this effect being solely due to the expansion of the universe. Together, the CCC+TL framework aims to explain observed cosmic signals. Is dark matter real? The concept of dark matter emerged from observational anomalies rather than theory alone. In the 1930s, astronomer Fritz Zwicky observed that galaxy clusters were moving in ways that could not be explained by the mass visible to the telescope. Later findings indicated that galaxies rotate faster than expected at their edges than expected, suggesting the presence of additional unseen influence of gravity. Evidence from Gravitational lensing further supports the idea that there is more mass than what is directly observable. According to the standard cosmological model, dark matter is believed to account for roughly 27 per cent of the universe, while ordinary matter makes up less than 5 per cent. The remainder is attributed to dark energy, a theoretical force thought to be responsible for the universe’s accelerating expansion. This framework also places the universe’s age at around 13.8 billion years. Redshifts and cosmic observations A key focus of the study is redshift, the phenomenon where light stretches to longer wavelengths as it travels. The analysis compares galaxy distributions at lower redshifts with those from the early universe at higher redshifts. It suggests that these observations can be explained using the CCC+TL model, without the need to include dark matter in the calculations. “There are several papers that question the existence of dark matter, but mine is the first one, to my knowledge, that eliminates its cosmological existence while being consistent with key cosmological observations that we have had time to confirm,” Gupta concluded. Also read: For Trump supporters, delulu is the only solulu - Science reveals why they back him, no matter what

The finding was discovered by Rajendra Gupta, a physics professor at the University of Ottawa, who has proposed a model that aims to explain the universe without dark matter or dark energy.

Dark matter doesn’t exist? New study challenges foundations & age of the universe

The observable universe extends to about 46.5 billion light years in radius. This boundary exists because light from more distant regions has not had time to reach us since the Big Bang, 13.8 billion years ago.

The observable universe is just 5% of reality, 95% remains invisible!

Approximately 13.8 billion years ago, the universe began as a singularity, a point of infinite density and temperature. This event, known as the Big Bang, marked the inception of space-time itself.

Why the universe is expanding and what it could mean for earth

Astronomers call this the observable universe, and its scale and limits reveal both the progress of science and the mysteries still unresolved.

Observable universe is 93 billion light years wide but what’s beyond it? Here’s what we can’t see...

From invisible forces shaping the stars to the birth of time itself, here are six discoveries that continue to redefine our understanding of existence.

6 mind-blowing facts about the universe that will leave you stunned

Set for launch in May 2027, NASA’s Nancy Grace Roman Space Telescope will embark on one of the most ambitious space missions ever attempted, charting the universe’s expansion history and revealing the mysterious force known as dark energy. 

'90 full moons ': NASA’s Roman Space Telescope set to map the universe and reveal dark energy’s secrets

Dark matter makes up over 95 per cent of the universe, but it remains a mystery to date. Two scientists have now suggested that particles known as tachyons that move faster than light likely make up dark matter. Scientists Samuel H. Kramer from the University of Wisconsin–Madison and Ian H. Redmount from Saint Louis University created these hypothetical particles called tachyons which they say go against Einstein’s theory of relativity according to which speed of light is the cosmic speed limit.&nbsp;

Tachyons can influence cosmic events in unimaginable ways, their paper states, adding that supposing that these particles dominate our universe, the idea would still conform to the framework of modern physics.&nbsp;

The scientists, as part of their theory, put forward a new model, according to which, the universe initially slows down before speeding up. The standard Lambda Cold Dark Matter (ΛCDM) model, according to which acceleration happens due to dark energy, doesn't remain the same since now the properties of tachyons dictate the pace of the universe’s expansion.

Since tachyons are faster than light, they assume a unique form of kinetic energy, causing a shift from deceleration to acceleration.

Also Read:&nbsp;<a href="https://www.wionews.com/science/supernova-lost-for-840-years-is-blowing-stellar-winds-again-738864">Supernova lost for 840 years is blowing stellar winds again</a>

They cited Type Ia supernovae, the consistently luminous “standard candles” of the universe, as proof of the theory, saying they are a reliable measure of distances across the universe. The researchers fitted their model to the supernova data and found that a universe where tachyons exist could explain the observed acceleration.

Their findings also matched with existing models, which means that the new tachyon-based model could be a valid alternative.

While tachyons simply exist in theory for now, if they were a reality, they could widely impact fields like particle physics and general relativity.

However, the model needs further testing and studies.&nbsp;

<h2>What is dark matter and dark energy?</h2>

Despite making up 95 per cent of our universe, not much is known about dark matter and dark energy. The movement of galaxies and galaxy clusters is largely influenced by dark matter which makes up 27 per cent of the universe, while dark energy is about 68 per cent and is responsible for the accelerated expansion of the universe.&nbsp; 
 
(With inputs from agencies)

Dark matter makes up over 95 per cent of the universe, but it remains a mystery to date. Two scientists have now suggested that particles known as tachyons that move faster than light likely make up dark matter.

Dark matter makes up over 95 per cent of the universe, but it remains a mystery to date. Two scientists have now suggested that particles known as tachyons that move faster than light likely make up dark matter. Scientists Samuel H. Kramer from the University of Wisconsin–Madison and Ian H. Redmount from Saint Louis University created these hypothetical particles called tachyons which they say go against Einstein’s theory of relativity according to which speed of light is the cosmic speed limit. Tachyons can influence cosmic events in unimaginable ways, their paper states, adding that supposing that these particles dominate our universe, the idea would still conform to the framework of modern physics. The scientists, as part of their theory, put forward a new model, according to which, the universe initially slows down before speeding up. The standard Lambda Cold Dark Matter (ΛCDM) model, according to which acceleration happens due to dark energy, doesn't remain the same since now the properties of tachyons dictate the pace of the universe’s expansion. Since tachyons are faster than light, they assume a unique form of kinetic energy, causing a shift from deceleration to acceleration. Also Read: Supernova lost for 840 years is blowing stellar winds again They cited Type Ia supernovae, the consistently luminous “standard candles” of the universe, as proof of the theory, saying they are a reliable measure of distances across the universe. The researchers fitted their model to the supernova data and found that a universe where tachyons exist could explain the observed acceleration. Their findings also matched with existing models, which means that the new tachyon-based model could be a valid alternative. While tachyons simply exist in theory for now, if they were a reality, they could widely impact fields like particle physics and general relativity. However, the model needs further testing and studies. What is dark matter and dark energy? Despite making up 95 per cent of our universe, not much is known about dark matter and dark energy. The movement of galaxies and galaxy clusters is largely influenced by dark matter which makes up 27 per cent of the universe, while dark energy is about 68 per cent and is responsible for the accelerated expansion of the universe. (With inputs from agencies)

Particles faster than light might make up dark matter, scientists suggest

Black holes are the source of dark energy, the mysterious force behind the accelerating expansion of the universe, says a new study. This claim comes from an international team that compared growth rates of black holes in different galaxies. The team concluded that the spread of the masses observed could be explained by black holes bearing cores of ‘dark energy’, a report by the Guardian said.&nbsp;

Seventeen researchers in nine countries shared&nbsp;their findings in two papers published in The Astrophysical Journal and The Astrophysical Journal Letters. One of the researchers, Duncan Farrah from the University of Hawaii, said, "We propose that black holes are the source for dark energy." Farrah added that this dark energy is produced when the normal matter is compressed during the death and collapse of large stars, the Guardian report added.&nbsp;

The researchers said the findings could be explained if black holes grow as the universe expands. They said that observations found black holes expanding 10 orders of magnitude in mass across most of cosmic history.&nbsp;

"The Kerr black hole solution is, however, provisional as its behaviour at infinity is incompatible with an expanding universe. Black hole models with realistic behaviour at infinity predict that the gravitating mass of a black hole can increase with the expansion of the universe independently of accretion or mergers, in a manner that depends on the black hole's interior solution," the research published in The Astrophysical Journal Letters said.&nbsp;

The researchers compared black hole masses in young galaxies with black hole masses in giant but dormant galaxies. In the younger galaxies, black holes can grow by swallowing nearby stars and other material. However, in the older ones, there is little left for them to suck in. They also found that black holes in dormant galaxies were seven to 20 times more massive than expected,&nbsp;a finding they say points to another process by which the black holes are growing.

“The importance of this work is that it’s taken the theories about black holes with dark energy cores and linked them for the first time to tangible observations of the universe,” said Chris Pearson, a co-author of the study who is also the Astronomy Group Leader at STFC RAL Space in Oxfordshire.&nbsp;

However, the claim that black holes are the source of dark energy was met with disapproval from some experts. Vitor Cardoso, a professor of physics at the Niels Bohr Institute in Copenhagen, said, there are many&nbsp;counter-arguments and facts that needed to be understood if this claim was going to live more than a few months. “What this study could also say is something as simple as black holes evolve differently today than they did billions of years ago,” Cardoso said, adding it was too early to think black holes are related to dark energy in any way.&nbsp;

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Black holes are the source of dark energy, the mysterious force behind the accelerating expansion of the universe, says a new study. This claim comes from an international team that compared growth rates of black holes in different galaxies.

Black holes are the source of dark energy, the mysterious force behind the accelerating expansion of the universe, says a new study. This claim comes from an international team that compared growth rates of black holes in different galaxies. The team concluded that the spread of the masses observed could be explained by black holes bearing cores of ‘dark energy’, a report by the Guardian said. Seventeen researchers in nine countries shared their findings in two papers published in The Astrophysical Journal and The Astrophysical Journal Letters. One of the researchers, Duncan Farrah from the University of Hawaii, said, "We propose that black holes are the source for dark energy." Farrah added that this dark energy is produced when the normal matter is compressed during the death and collapse of large stars, the Guardian report added. The researchers said the findings could be explained if black holes grow as the universe expands. They said that observations found black holes expanding 10 orders of magnitude in mass across most of cosmic history. "The Kerr black hole solution is, however, provisional as its behaviour at infinity is incompatible with an expanding universe. Black hole models with realistic behaviour at infinity predict that the gravitating mass of a black hole can increase with the expansion of the universe independently of accretion or mergers, in a manner that depends on the black hole's interior solution," the research published in The Astrophysical Journal Letters said. The researchers compared black hole masses in young galaxies with black hole masses in giant but dormant galaxies. In the younger galaxies, black holes can grow by swallowing nearby stars and other material. However, in the older ones, there is little left for them to suck in. They also found that black holes in dormant galaxies were seven to 20 times more massive than expected, a finding they say points to another process by which the black holes are growing. “The importance of this work is that it’s taken the theories about black holes with dark energy cores and linked them for the first time to tangible observations of the universe,” said Chris Pearson, a co-author of the study who is also the Astronomy Group Leader at STFC RAL Space in Oxfordshire. However, the claim that black holes are the source of dark energy was met with disapproval from some experts. Vitor Cardoso, a professor of physics at the Niels Bohr Institute in Copenhagen, said, there are many counter-arguments and facts that needed to be understood if this claim was going to live more than a few months. “What this study could also say is something as simple as black holes evolve differently today than they did billions of years ago,” Cardoso said, adding it was too early to think black holes are related to dark energy in any way. WATCH WION LIVE HERE You can now write for wionews.com and be a part of the community. Share your stories and opinions with us here.

Black holes are the source of dark energy that is causing expansion of the universe, study says

The plentiful but enigmatic material that does not emit light or energy is&nbsp;called&nbsp;dark matter.

Even though it is invisible, it&nbsp;is considered as a fundamental part of all galaxies including our own Milky Way.

It is thought to comprise about a quarter of the universe’s combined mass and energy and about 80 percent of its total mass but has not been directly observed.&nbsp;

<div class="videoWrapper trancodeVideo"><iframe allowfullscreen="" autoplay="1" class="includeVideo" frameborder="0" height="350" src="https://www.wionews.com/videos/gravitas-nasa-discovers-first-planet-outside-milky-way-galaxy-424278/embed" style="width:100%;max-width:560px;" width="560"></iframe></div>

Scientists believe it exists based on the gravitational effects it seems to exert on galaxies.

The universe’s ordinary matter includes things like gas, stars, black holes and planets, not to mention shoes, umbrellas, platypuses and whatever else you might see on Earth.

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Dark matter may have played a key role in forming the earliest stars, according to researchers who suggest that the mysterious and invisible material may also have been responsible for creating black holes.

As the universe initially was only helium and hydrogen, dark matter was critical in providing the gravitational force to pull these elements together to form stars. Now that there are other objects in the galaxy, dark matter is not needed to form stars.

Also see |&nbsp;<a href="https://www.wionews.com/photos/want-to-become-a-space-tourist-here-is-all-you-need-to-do-399437" hreflang="en">Want to become a space tourist? Here is all you need to do</a>

When the light from distant sources like faraway galaxies travels through matter such as another galaxy or a cluster of them, the light is deflected and bends - a phenomenon called ''gravitational lensing.''

The new observations have shown that gravitational lensing effects produced by galaxies residing inside the huge galaxy clusters were far stronger than the current dark matter theory envisioned, suggesting an unexpectedly large concentration of dark matter in these galaxies.

Like dark matter, cosmologists have little idea what dark energy is. They estimate that it accounts for 72 per cent of the universe.&nbsp;

Also see |&nbsp;<a href="https://www.wionews.com/photos/who-is-winning-space-tourism-race-between-bezos-branson-and-musk-396420" hreflang="en">Who is winning space tourism race between Bezos, Branson and Musk?</a>

An explanation for dark energy is that it is a property of space. Albert Einstein was the first person to realise that empty space is not nothing. Space has amazing properties, many of which are just beginning to be understood.&nbsp;

A property that Einstein discovered is that it is possible for more space to come into existence.

As per the Hubble Space Telescope (HST) observations of a very distant supernovae showed that, a long time ago, the universe was actually expanding more slowly than it is today.&nbsp;

So, the expansion of the universe has not been slowing due to gravity, as everyone thought, it has been accelerating.

Also read |&nbsp;<a href="https://www.wionews.com/science/nasas-lucy-spacecraft-facing-technical-problems-solar-panels-get-jammed-424985" hreflang="en">NASA's Lucy spacecraft facing technical problems, solar panels get jammed</a>

Most astronomers believe dark energy&nbsp;is a form of material that has an inverse gravity, repelling matter that comes close to it. This, scientists theorise, is driving the expansion of the universe, pushing stars, planets, and galaxies farther and farther apart.

Despite both components being visible, we know a lot more about dark matter since its existence was suggested as early as the 1920s, while dark energy wasn't discovered until 1998.

According to a study conducted by Cambridge University, an experiment to detect dark matter may instead have shown the presence of dark energy.

It conducted an underground, large-scale experiment INFN Laboritori Nazionalli del Gran Sasso in Italy and called it XENON1T.

The team constructed a physical model, which used a screening mechanism known as chamelon screening, to show that dark energy particles produced in the Sun's strong electromagnetic fields could explain the signal seen in the XENON1T.

Similarly, another project called PandaX-xT at China Jinping Underground Laboratory could help directly detect dark energy within the next decade.

The plentiful but enigmatic material that does not emit light or energy is called dark matter. Even though it is invisible, it is considered as a fundamental part of all galaxies including our own Milky Way.

The plentiful but enigmatic material that does not emit light or energy is called dark matter. Even though it is invisible, it is considered as a fundamental part of all galaxies including our own Milky Way. It is thought to comprise about a quarter of the universe’s combined mass and energy and about 80 percent of its total mass but has not been directly observed. Scientists believe it exists based on the gravitational effects it seems to exert on galaxies. The universe’s ordinary matter includes things like gas, stars, black holes and planets, not to mention shoes, umbrellas, platypuses and whatever else you might see on Earth. Also see | What a blast: The rush of amateur astronauts Dark matter may have played a key role in forming the earliest stars, according to researchers who suggest that the mysterious and invisible material may also have been responsible for creating black holes. As the universe initially was only helium and hydrogen, dark matter was critical in providing the gravitational force to pull these elements together to form stars. Now that there are other objects in the galaxy, dark matter is not needed to form stars. Also see | Want to become a space tourist? Here is all you need to do When the light from distant sources like faraway galaxies travels through matter such as another galaxy or a cluster of them, the light is deflected and bends - a phenomenon called ''gravitational lensing.'' The new observations have shown that gravitational lensing effects produced by galaxies residing inside the huge galaxy clusters were far stronger than the current dark matter theory envisioned, suggesting an unexpectedly large concentration of dark matter in these galaxies. Like dark matter, cosmologists have little idea what dark energy is. They estimate that it accounts for 72 per cent of the universe. Also see | Who is winning space tourism race between Bezos, Branson and Musk? An explanation for dark energy is that it is a property of space. Albert Einstein was the first person to realise that empty space is not nothing. Space has amazing properties, many of which are just beginning to be understood. A property that Einstein discovered is that it is possible for more space to come into existence. As per the Hubble Space Telescope (HST) observations of a very distant supernovae showed that, a long time ago, the universe was actually expanding more slowly than it is today. So, the expansion of the universe has not been slowing due to gravity, as everyone thought, it has been accelerating. Also read | NASA's Lucy spacecraft facing technical problems, solar panels get jammed Most astronomers believe dark energy is a form of material that has an inverse gravity, repelling matter that comes close to it. This, scientists theorise, is driving the expansion of the universe, pushing stars, planets, and galaxies farther and farther apart. Despite both components being visible, we know a lot more about dark matter since its existence was suggested as early as the 1920s, while dark energy wasn't discovered until 1998. According to a study conducted by Cambridge University, an experiment to detect dark matter may instead have shown the presence of dark energy. It conducted an underground, large-scale experiment INFN Laboritori Nazionalli del Gran Sasso in Italy and called it XENON1T. The team constructed a physical model, which used a screening mechanism known as chamelon screening, to show that dark energy particles produced in the Sun's strong electromagnetic fields could explain the signal seen in the XENON1T. Similarly, another project called PandaX-xT at China Jinping Underground Laboratory could help directly detect dark energy within the next decade.

Why is mysterious dark energy leading to expansion of the universe?

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Dark matter doesn’t exist? New study challenges foundations & age of the universe

The observable universe is just 5% of reality, and 95% remains invisible!

Why the universe is expanding and what it could mean for earth

Observable universe is 93 billion light years wide but what’s beyond it?

6 mind-blowing facts about the universe that will leave you stunned

NASA’s Roman Telescope set to map the universe and reveal dark energy’s secrets

Particles faster than light might make up dark matter, scientists suggest

Black holes are the source of dark energy that is causing expansion of the universe, study says

Why is mysterious dark energy leading to expansion of the universe?