That means a massive object such as a galaxy can act like a lens, bending light from things behind it to a focal point in front of it, and forming a natural telescope.

• 这意味着，如星系这样庞大的物体就好像一块透镜，将它背后物体射出的光折射到它前面的某个焦点，形成一个天然的望远镜。