国际首个！地下700米的大国重器，建设成功！

Core Insights - The Jiangmen Underground Neutrino Observatory (JUNO) has successfully completed its construction and released its first physical results, achieving a measurement precision of 1.5 to 1.8 times better than previous best results for two key solar neutrino oscillation parameters [1][2] Group 1: Scientific Significance of Neutrinos - Neutrinos, known as "ghost particles," can easily penetrate matter and carry ancient information about the universe's birth and evolution [2] - JUNO aims to determine the mass hierarchy of three types of neutrinos: electron neutrinos, muon neutrinos, and tau neutrinos, which is a fundamental question in neutrino physics [2] - The observatory will also conduct precise measurements of neutrino oscillation parameters and cross-research on solar, terrestrial, supernova, atmospheric neutrinos, and proton decay [2] Group 2: Implications for Humanity - The study of neutrinos is linked to the origins of the universe and the conditions necessary for the existence of matter, as their mass influences the formation of galaxies and stars [3] - Understanding neutrinos is a pure exploration of natural laws, with potential long-term benefits that are currently unpredictable, similar to the early discoveries of electricity [3] Group 3: Importance of Precision in Measurements - Accurate measurements of neutrino oscillation parameters are crucial for addressing unresolved questions in physics, such as whether neutrinos are their own antiparticles [4] - Inaccurate measurements could lead to significant resource investments in new experiments over many years, while precise measurements could clarify many ambiguous physical concepts [5] - The recent results from JUNO highlight the importance of high-precision measurements in resolving discrepancies in neutrino oscillation parameters, which may indicate new physics beyond the standard model [5]