Pressure waves from the black hole caused ripples in the cluster's hot gas, and scientists were able to translate them into a sound or note.

来自黑洞的压力波在星团的热气体中引起涟漪，科学家们能够将它们转化为声音或音符。

That's where photons literally move around the black hole, and around that is this hot gas that's drawn to the black hole, and it's hot because of friction.

光子在黑洞周围移动，围绕着这个吸引到黑洞的热气体，因为摩擦的缘故，它是热的。