6600万年前 外太阳系的C型小行星 导致恐龙灭绝 66 million years ago, a C-type asteroid from the outer solar system caused the extinction of dinosaurs.

6600万年前,由外太阳系木星外起源的稀有碳气小行星,导致恐龙灭绝,并发生重大大规模灭绝事件。 66 million years ago, a rare carbonaceous asteroid, originating from beyond Jupiter in the outer solar system, caused the extinction of dinosaurs and a significant mass extinction event. 科隆大学的研究人员分析了该事件岩石样本中的同位素,发现与碳化陨石中发现的同位素相匹配,有力地证明小行星是主要由碳组成的C型小行星。 Researchers from the University of Cologne analyzed ruthenium isotopes in rock samples from the event and found a match with isotopes found in carbonaceous meteorites, providing strong evidence that the asteroid was a C-type asteroid, composed mainly of carbon. 这项研究不仅证实了小行星的起源,而且还排除了彗星作为撞击器的可能性,并提供了证据,证明了地球撞击器在其最后的积聚阶段的太阳系外起源. The study not only confirms the asteroid's origin but also rules out the possibility of a comet as the impactor and provides evidence for the outer solar system origin of Earth's impactors during its final stages of accretion.