Help me out here. I have trouble understanding the concept of a stable wormhole formed by having a blackhole on one end, and a "white hole" made of exotic matter at the other end, forming a topological donut linking two regions of sapce. that all sounds great, but a blacj hole is a misnomer rigth? t's not a hole, and it's still just the massive remains of a collapsed star with a DEEEEP gravitational well. So, when it is theorsed w.r.t to a wormhole, what exactly is happening. There is no "hole" to go through...right? HELP! Thanks in advance.