{"id":3655,"date":"2026-01-30T02:38:45","date_gmt":"2026-01-30T02:38:45","guid":{"rendered":"https:\/\/terrarara.com.br\/en\/?page_id=3655"},"modified":"2026-01-30T02:38:45","modified_gmt":"2026-01-30T02:38:45","slug":"o-modelo-padrao-da-cosmologia-se-mantem-firme-em-um-grande-estudo-de-seis-anos-sobre-o-universo","status":"publish","type":"page","link":"https:\/\/terrarara.com.br\/en\/?page_id=3655","title":{"rendered":"The standard model of cosmology holds firm in a vast six-year study of the universe ? with one important caveat"},"content":{"rendered":"
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The Dark Energy Survey collected data from hundreds of millions of galaxies over six years to build on our understanding of the universe’s expansion history. (Image credit: CTIO\/NOIRLab\/DOE\/NSF\/AURA)<\/figcaption><\/figure><\/div>
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\r\n\t#standard model of cosmology<\/a><\/p>

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\r\nA large international study called the Dark Energy Survey, conducted over six years, analyzed data from approximately 669 million galaxies<\/strong><\/p>

The observations were made with the Victor M.<\/p>

\r\nBlanco Telescope in Chile and used four different methods to map the expansion of the universe: baryon acoustic oscillations (a kind of “fingerprint” left on ordinary matter shortly after the Big Bang), Type Ia supernova explosions (which serve as standard candles for measuring cosmic distances), galaxy clusters, and weak gravitational lensing (the bending effect of light caused by the gravity of large masses).\r\n<\/p>

\r\nThe main result is that these data strongly support the Standard Model of Cosmology, known as Lambda-CDM.<\/p>

\r\nThis model describes a universe where about 70% of the total energy is dark energy with constant density – that is, the force that accelerates the expansion of the cosmos does not change over time.<\/p>

\r\nDark energy acts as a kind of negative pressure, pushing everything outward, and the study confirms that this simple view continues to work consistently with measurements.\r\n<\/p>

\r\nThe researchers involved celebrated the achievement.<\/p>

\r\nOne of them said it was like fulfilling an old dream: finally gathering all the planned data and seeing the project’s four probes producing coherent results.<\/p>

\r\nThe conclusions reinforce what previous observations, such as those from the Planck satellite, already indicated, and establish even more precise limits for the behavior of the universe.\r\n<\/p>

\r\nHowever, there is an important caveat.<\/p>

\r\nBoth the model with constant dark energy and an alternative version in which it varies slightly over time fit the cosmic expansion data equally well.<\/p>

\r\nBut neither fully explains the observed pattern in the distribution of galaxies-the way matter clumps together on a large scale in the universe seems slightly different from what predictions indicate.<\/p>

\r\nThe difference is not large enough to rule out the standard model, but it shows that some piece is still missing for us to understand everything perfectly.\r\n<\/p>

\r\nThis result does not resolve issues such as the possible variation of dark energy (a topic that other projects, such as DESI, explore in more depth), but it highlights the need for future observations, such as those from the Vera C.<\/p>

\r\nRubin Observatory, to better test theories and clarify the mysteries that still surround dark energy and the large-scale structure of the cosmos.

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Published in 01\/30\/2026 02h38<\/em><\/p>\r\n

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Portuguese version<\/a><\/em><\/p>\r\n

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Text adapted by AI (Grok) and translated via Google API in the English version. Images from public image libraries or credits in the caption. Information about DOI, author and institution can be found in the body of the article.<\/p>\r\n\t\t

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