标准宇宙学模型
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宇宙可能不是想象的那么“匀称”
Huan Qiu Wang Zi Xun· 2025-12-29 01:27
Core Findings - An international research team has published a review article in "Modern Physics Reviews," revealing that the universe may not be as uniform as previously thought, suggesting it could be "skewed" like a balloon that has been pressed on one side [1][3]. Group 1: Theoretical Implications - The discovery challenges the widely accepted "standard cosmological model," which is based on the belief that the universe should appear similar in all directions and locations, akin to a perfectly uniform cake batter [3]. - Scientists have identified a contradiction known as the "cosmic dipole anomaly," which relates to the slight temperature variations in the cosmic microwave background radiation, a remnant from the Big Bang [3][4]. Group 2: Observational Evidence - Observations of distant galaxies have shown a "skewed" distribution that does not align with the expected patterns based on the temperature variations of the cosmic microwave background, indicating a significant discrepancy [4]. - The consistency of results from various instruments, including ground-based radio telescopes and space satellites, strengthens the validity of these findings and reduces the likelihood of instrument error [4]. Group 3: Future Research Directions - Upcoming projects, such as the Euclid satellite and the Vera C. Rubin Observatory, are expected to provide clearer "cosmic panoramas," which may help resolve whether the universe is a regular sphere or has a more complex shape that is not yet understood [4].
“宇宙大片”看到了什么(科技大观)
Ren Min Wang· 2025-09-25 22:53
Core Insights - The COSMOS-Web project has created the largest deep-space cosmic map to date, marking the positions, speeds, and evolutionary histories of nearly 800,000 galaxies over a time span of 13.5 billion years, covering 98% of the universe's evolution history [1][4] Group 1: Project Overview - COSMOS-Web is based on data from the James Webb Space Telescope (JWST) and represents a significant advancement in cosmic mapping, providing unprecedented insights into galaxy formation and evolution [1][3] - The project involved a total observation time of 255 hours, making it the longest single project in JWST's first year, with data exceeding 1.5TB [2] Group 2: Technological Advancements - JWST's revolutionary infrared observation capabilities distinguish it from its predecessor, the Hubble Space Telescope, allowing it to observe wavelengths from 0.6 to 28 micrometers, thus enabling the study of earlier cosmic evolution stages [3] - The larger primary mirror of JWST, approximately six times that of Hubble, enhances its light-gathering ability and sensitivity, allowing it to detect fainter and more distant celestial bodies [3] Group 3: Key Discoveries - The project revealed an unexpectedly high number of galaxies in the early universe, with actual counts being about ten times higher than predictions based on Hubble data, challenging existing cosmological models [4] - The existence of supermassive black holes in the early universe, which were thought to take billions of years to form, was also confirmed, suggesting a need to rethink the relationship between galaxies and black holes [4] - These findings pose significant challenges to current cosmological theories, indicating potential unknown physical processes or the need for fundamental revisions in understanding dark matter and early universe physics [4]