\n
![\"EarthSnap\"\/](\"https:\/\/www.newsbeep.com\/ca\/wp-content\/uploads\/2026\/01\/earthsnap-banner-news.webp.webp\")
\n<\/a><\/p>\n
That picture has guided textbooks, space missions, and how we read the sky. It has also raised tough questions that have never quite gone away, mainly because of the fact that dark matter and dark energy<\/a> have never actually been \u201cseen.\u201d<\/p>\n After searching for this elusive \u201cdark matter\u201d for decades, at what point does the scientific community decide it may not actually exist at all?<\/p>\n Challenging dark matter\u2019s existence<\/p>\n A new line of thinking takes those questions seriously and suggests we may not need those \u201cdark\u201d invisible components after all.<\/p>\n After years spent probing longstanding cosmology puzzles, physics professor Rajendra Gupta<\/a> has proposed a model that aims to explain the universe without dark matter or dark energy. <\/p>\n Gupta teaches astrophysics at the University of Ottawa<\/a> and argues that familiar assumptions might be impeding progress.<\/p>\n \u201cThe study\u2019s findings confirm that our\u00a0previous work<\/a>\u00a0(\u201cJWST early universe observations and \u039bCDM cosmology\u201d) 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,\u201d explains Gupta.<\/p>\n \u201cTired light\u201d and the CCC theory<\/p>\n Gupta\u2019s approach blends two concepts: covarying coupling constants (CCC<\/a>) and \u201ctired light\u201d (TL<\/a>). <\/p>\n CCC asks whether the so-called constants of nature \u2013 like the strength of forces or the speed of light<\/a> \u2013 might shift across time or space. If they do, even slightly, many calculations about how the universe evolves would change.<\/p>\n TL offers a different take on why light from faraway galaxies appears redshifted. Instead of treating redshift solely as a sign of cosmic expansion stretching light, TL suggests that photons shed energy over vast distances, shifting their color toward red. <\/p>\n Taken together, the CCC+TL model seeks to account for cosmic signals.<\/p>\n Most scientists think dark matter is real<\/p>\n The idea of dark matter did not arise in a vacuum. In the 1930s, astronomer Fritz Zwicky<\/a> noticed that galaxy clusters seemed to move in ways that did not match their visible mass. <\/p>\n Later, astronomers saw that many galaxies rotate faster than expected at their outskirts. Something appears to add extra gravity. Gravitational lensing<\/a> \u2013 the way mass bends light \u2013 also points to more pull than starlight alone can explain.<\/p>\n In the standard breakdown, dark matter is thought to make up about 27% of the universe. Ordinary matter \u2013 everything we can directly detect \u2013 adds up to less than 5%. <\/p>\n The rest is labeled dark energy<\/a>, a placeholder for whatever drives the universe\u2019s accelerated expansion. This picture also includes a commonly accepted age of roughly 13.8 billion years.<\/p>\n Questioning the need for dark matter<\/p>\n Gupta contends that if the forces of nature weaken over time, we do not need dark energy to explain why the expansion appears to speed up. <\/p>\n He also argues that major observations can be matched without dark matter by allowing constants to vary and by letting light lose a small amount of energy as it travels long distances to reach us, the observers.<\/p>\n \u201cContrary to standard cosmological theories where the accelerated expansion<\/a> of the universe is attributed to dark energy, our findings indicate that this expansion is due to the weakening forces of nature, not dark energy,\u201d Gupta continues.<\/p>\n Redshifts and cosmic observations<\/p>\n A substantial part of the work centers on redshifts<\/a> \u2013 how light shifts toward longer wavelengths as it travels. <\/p>\n The analysis compares how galaxies are distributed at low redshift with patterns from the early universe at high redshift. <\/p>\n The claim is that these signals align under the CCC+TL approach<\/a> without requiring dark matter in the equations.<\/p>\n \u201cThere 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,\u201d Gupta confidently concludes.<\/p>\n What does all of this mean?<\/p>\n If CCC+TL continues to pass tests, much would change. The model would offer new routes to explain the cosmic microwave background<\/a>, the timeline of how galaxies formed and grew, and the way light bends on its journey to our telescopes. <\/p>\n It would also change how we read distance and time from the sky, since redshift would no longer be only a ruler for expansion.<\/p>\n It would challenge the Big Bang\u2013anchored timeline. Those are substantial claims that require careful tests.<\/p>\n Testing Gupta\u2019s theory<\/p>\n Specific predictions need to be articulated. Any model has to meet observations head-on: galaxy rotation profiles, lensing maps, the pattern of hot and cold spots in the microwave background<\/a>, and the way galaxies cluster<\/a> across hundreds of millions of light-years. <\/p>\n If constants vary, even a little, that could leave signatures in atomic spectra from distant quasars. If light tires, the effect should be measurable with enough precision and a clean way to separate it from other causes.<\/p>\n Teams are already poring over deep-sky surveys, precise supernova samples, and high-resolution microwave maps. <\/p>\n As instruments improve, the bar for any alternative rises. The goal is straightforward: make a clear, testable forecast, then see if the universe agrees.<\/p>\n Dark matter, CCC+TL, and next steps<\/p>\n Two central questions remain. Are dark energy and dark matter just bookkeeping devices we used while working with fixed constants and a single redshift story? Could the true age of the universe be significantly older than the standard estimate? <\/p>\n The only way to answer is to press for independent tests that can separate one picture from the other.<\/p>\n Researchers are tuning methods to compare models fairly, using the same data pipelines and error checks. That helps avoid apples-to-oranges results. <\/p>\n If CCC+TL keeps matching the sky, interest will grow. If it stumbles on a key observation, that will be clear too.<\/p>\n Cosmology moves forward when claims meet data. This study advances a bold alternative: a universe where constants can change, light can lose energy across great distances, and neither dark matter nor dark energy need to be included in the ledger. <\/p>\n It offers clear, testable statements about cosmic age and the cause of the apparent acceleration.<\/p>\n The work will be validated or refuted by measurements. That is how the field operates: no shortcuts, no hand-waving \u2013 only observations and models that either fit or fail.<\/p>\n The full study was published in The Astrophysical Journal<\/a>.<\/p>\n \u2014\u2013<\/p>\n Like what you read? Subscribe to our newsletter<\/a> for engaging articles, exclusive content, and the latest updates.<\/p>\n Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"The universe feels simple at first glance: stars, gas, dust, and the gravity that binds it all. Then…\n","protected":false},"author":2,"featured_media":109214,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[49,48,314,66],"class_list":{"0":"post-604607","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-physics","8":"tag-ca","9":"tag-canada","10":"tag-physics","11":"tag-science"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/604607","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/comments?post=604607"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/604607\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media\/109214"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media?parent=604607"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/categories?post=604607"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/tags?post=604607"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}