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总结
多家媒体报道，研究人员基于最新宇宙学观测与模型推演提出，暗能量可能并非恒定不变，存在随时间变化的迹象，从而使宇宙长期“永远加速膨胀”的结论面临不确定性。若暗能量性质发生转变并由“推动膨胀”改为减弱甚至促使回缩，宇宙可能在极其遥远的未来停止扩张并开始坍缩，恒星、行星及星系物质逐步被引力拉向更致密区域，最终在整体收缩中汇聚成一个高温高密度的巨大火球。相关结果引发对暗能量本质、宇宙终极命运及现有标准模型修正方向的讨论。
正文
Big Bang in reverse: Stars, planets and Universe may collapse into one massive fireball, scientists say Moneycontrol A twist in the tale: are scientists wrong about dark energy? The Hindu Universe will collapse into one big fireball, with stars and planets sucked into a core WION Is The Universes Endless Expansion In Doubt? Changing Dark Energy Sparks Fresh Cosmic Debate NDTV Dark Energy may be changing and with it the fate of the Universe BBC
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