We see quite a few white dwarfs, as well as neutron stars and black holes in them — if they have stellar companions, they strip off their material, which falls in and emits X-rays.

我们在其中看到了不少白矮星，以及中子星和黑洞——如果它们有伴星，它们就会剥离自己的物质，这些物质落入球状星团并发射 X 射线。