梯形獵戶座的中心
Trapezium: At the Heart of Orion
來源：Fred Zimmer｜發表日期：2024-01-05
在這幅清晰的宇宙畫像的中心附近，獵戶座星雲的中心，有四顆炙熱的大質量恆星，它們被稱為梯形星。它們聚集在一個半徑約為 1 . 5 光年的區域內，主導著稠密的獵戶座星雲星團的核心。梯形星的紫外線電離輻射，主要來自最亮的獵戶座 C Theta- 1 號恆星，為這個複雜的恆星形成區域的整個可見光提供了能量。獵戶座星雲星團大約有 300 萬年的歷史，年輕時更加緊湊，一項動力學研究表明，早期失控的恆星碰撞可能形成了一個質量是太陽 100 多倍的黑洞。星團內黑洞的存在可以解釋所觀測到的梯形恆星的高速。獵戶座星雲距離地球約 1500 光年，是已知距離地球最近的黑洞之一。
原文：Near the center of this sharp cosmic portrait, at the heart of the Orion Nebula, are four hot, massive stars known as the Trapezium. Gathered within a region about 1.5 light-years in radius, they dominate the core of the dense Orion Nebula Star Cluster. Ultraviolet ionizing radiation from the Trapezium stars, mostly from the brightest star Theta-1 Orionis C powers the complex star forming region's entire visible glow. About three million years old, the Orion Nebula Cluster was even more compact in its younger years and a dynamical study indicates that runaway stellar collisions at an earlier age may have formed a black hole with more than 100 times the mass of the Sun. The presence of a black hole within the cluster could explain the observed high velocities of the Trapezium stars. The Orion Nebula's distance of some 1,500 light-years would make it one of the closest known black holes to planet Earth.
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