NASA·APOD每日天文一图2022.5.13 [超高清]

哈哈哈，APOD你猜对了吗？没错！就是它：

There's a black hole at the center of the Milky Way. Stars are observed to orbit a very massive and compact object there known as Sgr A* (say "sadge-ay-star"). But this just released radio image (inset) from planet Earth's Event Horizon Telescope is the first direct evidence of the Milky Way's central black hole. As predicted by Einstein's Theory of General Relativity, the four million solar mass black hole's strong gravity is bending light and creating a shadow-like dark central region surrounded by a bright ring-like structure. Supporting observations made by space-based telescopes and ground-based observatories provide a wider view of the galactic center's dynamic environment and an important context for the Event Horizon Telescope's black hole image. The main panel image shows the X-ray data from Chandra and infrared data from Hubble. While the main panel is about 7-light years across, the Event Horizon Telescope inset image itself spans a mere 10 light-minutes at the center of our galaxy, some 27,000 light-years away. 

在银河系的中心有一个黑洞。观测到恒星围绕着一个非常大且紧凑的天体运行，该天体被称为Sgr a*（即“sadge ay星”）。这张刚刚从地球事件视界望远镜发布的射电图像（上图）是银河系中心黑洞的第一个直接证据。正如爱因斯坦的广义相对论所预测的那样，400万太阳质量的黑洞的强大引力正在弯曲光线，形成一个阴影状的黑暗中心区域，周围环绕着一个明亮的环状结构。由天基望远镜和地面天文台进行的支持性观测为银河系中心的动态环境提供了更广阔的视野，并为事件视界望远镜的黑洞图像提供了重要背景。主面板图像显示了钱德拉的X射线数据和哈勃的红外数据。虽然主面板的直径约为7光年，但“事件地平线”望远镜的插入图像本身在我们银河系中心的跨度仅为10光-分钟，约为27000光年。