暗能量
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JUST光谱望远镜向未知发问
Xin Lang Cai Jing· 2026-02-07 07:21
Core Insights - The article discusses the advancements in astronomical observation and the significance of dark matter and dark energy in understanding the universe, highlighting the need for innovative observational tools to explore these mysteries [2][3]. Group 1: Dark Matter and Dark Energy - Less than 5% of the universe is composed of visible matter, while over 95% consists of dark matter and dark energy, which are crucial for shaping galaxy structures and driving cosmic expansion [2]. - Understanding dark matter and dark energy could lead to a revolution in physics, comparable to the impacts of relativity and quantum mechanics [2]. Group 2: Global Scientific Efforts - Global scientific efforts have been ongoing for decades, with various international observational projects like the DESI project in the U.S., the Euclid space telescope in Europe, and Japan's Subaru-PFS aiming to uncover the secrets of the universe [2][3]. Group 3: China's Astronomical Advancements - China is making significant strides in astronomy, although it still lags behind in ground-based optical spectral observation capabilities compared to international standards [3]. - The Guo Shoujing Telescope (LAMOST) and the upcoming Chinese Space Station Telescope (CSST) are notable projects, with CSST expected to achieve breakthroughs in galaxy imaging by 2027 [3][4]. Group 4: JUST Telescope Project - The JUST telescope, a 4.4-meter spectroscopic telescope located in Qinghai, aims to capture the "fingerprints" of the universe by obtaining spectra from tens of millions of galaxies [4]. - JUST is designed to have the highest fiber positioning density globally, allowing it to capture spectra from dense regions of the sky, significantly improving coverage compared to existing telescopes [4][5]. Group 5: Scientific Goals and Future Plans - JUST plans to observe over ten million galaxies within the next five years, creating a detailed three-dimensional map of the universe and accurately measuring the history of cosmic expansion [5]. - The telescope will utilize advanced technology and a prime observational site to transition China's astronomy from data consumption to active interpretation of cosmic phenomena [5].
“暗能量巡天”项目发布观测数据集
Ke Ji Ri Bao· 2026-01-29 01:27
研究团队称,最新分析显示,可行的理论模型范围进一步收窄,整体上更接近当前宇宙学中广泛采 用的标准模型。 不过,仍有一个参数与观测结果不完全一致。根据早期宇宙的观测结果,标准模型和演化暗能量模 型都对后期宇宙中物质的聚集方式作出了预测,但DES对星系团的测量结果与这些预测存在差异。随着 新数据的加入,这一差异有所扩大,但其统计显著性尚未达到推翻现有标准宇宙学模型的阈值。即使将 DES数据与其他实验结果结合,这一偏差仍然存在。 研究团队表示,下一步将把DES成果与其他暗能量实验的最新约束条件结合,用于检验替代引力理 论和暗能量模型。 国际"暗能量巡天"(DES)项目团队正式发布了DES运行6年来获得的首个完整观测数据集。数据 集涵盖了DES从2013年至2019年间758个夜晚的观测,观测对象为1/8的天空。首次将相机记录的全部数 据整体对外公开,为全球物理学家研究暗能量和宇宙演化提供了重要基础。相关研究成果已提交《物理 评论D》杂志。 (责编:罗知之、陈键) 关注公众号:人民网财经 在6年的观测中,该项目利用5.7亿像素的暗能量相机(DECam)进行了深空广域巡视,记录了距离 地球数十亿光年的6.69亿个星系的 ...
“暗能量巡天”项目发布观测数据集 6年信息涵盖1/8的天空
Ke Ji Ri Bao· 2026-01-29 00:59
国际"暗能量巡天"(DES)项目团队正式发布了DES运行6年来获得的首个完整观测数据集。数据集涵 盖了DES从2013年至2019年间758个夜晚的观测,观测对象为1/8的天空。首次将相机记录的全部数据整 体对外公开,为全球物理学家研究暗能量和宇宙演化提供了重要基础。相关研究成果已提交《物理评论 D》杂志。 自上世纪90年代末天文学家发现宇宙加速膨胀现象以来,"暗能量"便成为物理学界关注的焦点。作为一 种至今未被直接探测到且与物质极少发生相互作用的宇宙成分,暗能量的物理性质只能通过观测天体分 布与演化特征进行间接推断。DES项目正是为了应对这一挑战,旨在通过深空广域巡天观测,为揭示暗 能量的物理本质提供更精确的理论约束。 研究团队称,最新分析显示,可行的理论模型范围进一步收窄,整体上更接近当前宇宙学中广泛采用的 标准模型。 不过,仍有一个参数与观测结果不完全一致。根据早期宇宙的观测结果,标准模型和演化暗能量模型都 对后期宇宙中物质的聚集方式作出了预测,但DES对星系团的测量结果与这些预测存在差异。随着新数 据的加入,这一差异有所扩大,但其统计显著性尚未达到推翻现有标准宇宙学模型的阈值。即使将DES 数据与其他 ...
2025年,十大太空发现 | 红杉爱科学
红杉汇· 2025-12-26 00:06
Group 1 - The article highlights ten significant space discoveries in 2025, including gravitational wave echoes from deep space and extreme high-energy particles traversing the Milky Way [3] - The discoveries address long-standing scientific questions and challenge existing assumptions about the fundamental laws of the universe [3] - Key findings include clues to life's building blocks in asteroid samples, the detection of interstellar comets, and the first observation of coronal mass ejections beyond the Sun [3][5][10] Group 2 - The asteroid Bennu, approximately 525 meters in diameter and 320 million kilometers from Earth, yielded samples containing various salts, ribose, glucose, and organic materials, suggesting that the building blocks of life may originate from space [5] - The comet 3I/ATLAS, entering the solar system at a speed of about 152,000 miles per hour, is the third confirmed interstellar object, with ongoing observations to determine its size and physical properties [7] - The first direct observation of coronal mass ejections from an M dwarf star was achieved, marking a significant milestone in understanding solar phenomena [10] Group 3 - A report identified five known microquasars in the Milky Way as sources of high-energy cosmic rays, confirming the existence of natural "particle engines" [13] - An extreme black hole merger event was reported, creating a new black hole with a mass of approximately 225 solar masses, challenging existing theories about black hole mass ranges [16] - The LIGO observatory captured the clearest gravitational wave signal to date, validating Stephen Hawking's area theorem with a confidence level of 99.999% [19] Group 4 - The KM3NeT detector in the Mediterranean reported the detection of a neutrino with an energy of 220 PeV, setting a new record for neutrino energy [22] - Astronomers measured the distribution of ordinary baryonic matter in the universe, revealing that over three-quarters of it is hidden in diffuse gas between galaxies, addressing the "missing baryon problem" [25] - Recent findings suggest that dark energy, previously thought to be constant, may be weakening, which could necessitate significant revisions to the cosmological standard model [26][27] Group 5 - New-generation telescopes, including the Euclid space telescope and Vera C. Rubin Observatory, have released unprecedented cosmic data, paving the way for a new era of understanding in areas such as asteroid and galaxy evolution, dark matter, and dark energy [30]
宇宙之外是什么?答案根本不是人类大脑能想象的,只能靠猜
Sou Hu Cai Jing· 2025-12-20 22:10
Group 1 - The universe does not have an "outside" as the concept of "outside" requires space and time, which are defined by the universe itself [3][5][11] - The observable universe has a radius of approximately 46.5 billion light-years and a diameter of about 93 billion light-years, but this is only a "horizon" set by the speed of light [5][7] - According to Hubble's law, galaxies that are far enough away are receding from us faster than the speed of light, meaning their light will never reach our observable universe [7][19] Group 2 - Understanding a "boundary-less universe" requires a topological perspective, with three main geometric models: flat infinite universe, closed universe, and open universe [8][11] - The concept of time is also tied to the universe's existence, as time began to have physical meaning only after the Big Bang [13][15] - Inflation theory explains the uniformity of distant galaxies' temperature and matter distribution, as they were once in a small region before being rapidly expanded [17][19] Group 3 - Dark energy, which constitutes about 68.3% of the universe's total energy, drives the accelerated expansion of the universe [19][21] - Potential outcomes of the universe's fate include the "Big Rip," where everything is torn apart, and "heat death," where the universe reaches maximum entropy and becomes a cold void [19][21] - The multiverse theory suggests our universe may be one of many, with different physical laws in each, leading to the anthropic principle that explains why our universe's parameters are suitable for life [21][23] Group 4 - The simulation hypothesis posits that if civilizations can create simulated universes, the number of simulated universes would far exceed real ones, supported by various physical phenomena [25][27] - The idea of the universe being a program raises questions about the nature of reality and existence beyond our perception [27][28] - The ability to contemplate the universe and its mysteries is seen as a significant aspect of human existence, highlighting the unique capacity for thought [28]
邓正红软实力哲学:暗能量的隐性势能不断转化为推动宇宙结构重构的显性效能
Sou Hu Cai Jing· 2025-09-28 05:57
Group 1 - The core of Deng Zhenghong's soft power philosophy is the potential energy conversion equation, which reinterprets the fundamental laws of the universe from both physical and mathematical perspectives [1] - The theory proposes that "rules precede matter," suggesting that the essence of the universe lies in the holographic unity of latent wisdom potential and explicit material effectiveness [1][3] - Black holes are described as conversion nodes where hard power transforms into soft power potential, with the release of X-rays during the consumption of stars serving as a cosmic-level empirical example [1][2] Group 2 - The energy conversion equation proposed by Deng Zhenghong is defined as Eᵣ=κ∫(∂g/∂t )dV, where Eᵣ represents the output of converted explicit energy, κ is the conversion efficiency coefficient, and ∫(∂g/∂t )dV represents the core driving force [2] - The rules entropy formula introduced by Deng Zhenghong aims to describe the contribution of "regularity," "structure," or "order" to "entropy" in more complex systems [2] - The Ψ function model indicates that when collision parameters reach the golden ratio of 0.618, the efficiency of potential energy conversion experiences a significant increase [2] Group 3 - Deng Zhenghong's "Taiji Yin-Yang transformation" model extends the idea of dynamic balance between dark energy (latent soft power) and matter (explicit hard power) through "rule phase transitions" [3] - The rules entropy formula provides a new perspective for cosmological research, suggesting that the evolution of the universe is a process of interaction between rules and matter rather than mere disorder [3] - In the energy sector, Deng Zhenghong's soft power model reveals that current oil price fluctuations are fundamentally a dynamic equilibrium of multiple soft powers, with infrastructure resilience emerging as a new soft power indicator [3][5]
在解构中重建,在错误中涅槃
Hua Xia Shi Bao· 2025-09-19 07:56
Core Insights - The article emphasizes that mistakes are an integral part of scientific progress, challenging the notion that errors should be avoided at all costs [2][3] - It highlights that scientific advancement occurs not through the accumulation of correct observations but through the refutation of existing theories and the proposal of new ones [3][4] Group 1: Importance of Mistakes in Science - The book "Why Greatness Needs Mistakes" illustrates that errors are common in scientific endeavors and are essential for innovation [2][4] - Examples from genetics and physics demonstrate how mistakes have led to significant advancements, such as Einstein's cosmological constant, which later contributed to the understanding of dark energy [3][4] - The article discusses the case of Hoyle's steady state universe model, which, despite being challenged, led to important insights regarding the creation of heavy elements in stars [3][4] Group 2: Distinction Between Science and Management - The article notes that many real-world problems are engineering issues rather than scientific ones, requiring a different approach to decision-making [4][5] - It points out that the cultural belief in China that scholars should take on management roles can lead to mismatches in leadership, as scientific thinking differs from management thinking [4][5] - The experience of a respected researcher who struggled in a management role illustrates the challenges faced when scientists transition to administrative positions [5] Group 3: The Nature of Scientific Inquiry - The article asserts that science is a methodology rather than an absolute truth, emphasizing the need for openness and adaptability in scientific inquiry [5][6] - It argues that the belief in the sanctity of science is a misunderstanding of its spirit, which should embrace questioning and the acceptance of new evidence [5][6]
暗能量与宇宙命运 | Shuang Wang | TEDxShahe Street
TEDx Talks· 2025-08-18 15:56
Cosmology & Astrophysics - The talk explores the ultimate fate of the universe, including scenarios like the Big Crunch, eternal darkness, and being torn apart into nothingness [1] - It delves into concepts such as the accelerating expansion of the universe and the mysterious force of dark energy [1] - The presentation connects these seemingly distant cosmological concepts to our existence [1] Speaker Information - The speaker is Wang Shuang, an associate professor at the School of Physics and Astronomy at Sun Yat-sen University [1] - Wang Shuang is also a science writer [1] Event Information - The talk was given at a TEDx event [1] - The TEDx event was independently organized by a local community using the TED conference format [1]
涉及暗能量、台风路径异常……2025重大科学问题、技术难题等发布
Yang Shi Xin Wen· 2025-07-06 02:42
Group 1 - The Chinese Association for Science and Technology has released significant scientific, engineering, and industrial technology issues for 2025 [1] - Ten frontier scientific issues include topics such as the topology and geometric classification of manifolds, the nature and mass origin of the Higgs particle, and the feasibility of using quasi-metals as substitutes for transition metals in precise synthesis and catalytic reactions [2] - Ten engineering technology challenges focus on integrated algorithms for complex model design, simulation, and manufacturing, as well as technologies for deep-sea mining equipment and environmental disturbance suppression [2] - Ten industrial technology issues address breakthroughs in high-end equipment for large-scale seawater desalination, improvements in the oxidation resistance of ultra-supercritical steam turbine blades, and the development of autonomous mining technologies for deep space resource exploration [2][3]
院士南疆开讲,激励边疆学子种下科学种子
Nan Fang Nong Cun Bao· 2025-06-30 14:36
Core Points - The event "Science and China" and Guangdong Science Popularization in Southern Xinjiang series was held in Kashgar and the Third Division of the Xinjiang Production and Construction Corps, featuring prominent scientists to inspire local students [2][6][70] - Over 10,000 students participated in 13 science lectures, which aimed to promote scientific knowledge and support regional development [3][4][6] - The activities align with national policies on science popularization and support for Xinjiang, emphasizing high-quality educational initiatives [5][6][71] Group 1 - The series of lectures included topics such as astrophysics, mathematics, and biodiversity, delivered by renowned academicians and researchers [9][20][37] - The lectures sparked curiosity among students, encouraging them to explore scientific fields and understand the relevance of mathematics in technology and daily life [22][58][60] - The event was supported by various institutions, including the Chinese Academy of Sciences and local educational authorities, highlighting a collaborative effort in science education [72][80][81] Group 2 - The initiative aims to enhance the scientific literacy of youth in Southern Xinjiang, providing them with access to quality educational resources [86][88] - The program is part of a broader strategy to implement technology assistance and talent development in the region, focusing on agriculture, health, and digital technology [83][85][91] - Future plans include expanding cooperation with various sectors to enrich science education and foster innovation among local students [92][94]