Main Question or Discussion Point
How many are the ways a Black hole without *ACCERTION DISK* can be spotted?
So, we are no longer expecting the OP to do some work before we give answers? Did you think ibix was not aware of these?A couple other ways I can think of:
1. Orbits of stars nearby.
2. Gravitational micro-lensing.
3. Gravitational waves (if two black holes are orbiting each other).
4. Sending in TARS or CASE.
Well, I thought sending in TARS or CASE was pretty clever... On a more serious note, I thought OP's question was simple enough that it didn't require the back and forth of asking OP to search elsewhere first. I generally leave the "please show effort" kind of responses to the Homework forum or for questions that are far too broad to answer concisely. If it's PF's current policy (I've been gone for a few years) that OP needs to show effort here as well, I can redact my post.So, we are no longer expecting the OP to do some work before we give answers? Did you think ibix was not aware of these?
Ok, I will keep this in mind in the future. And, thanks! :DNo need to redact now that the OP has seen it. But yes, a common theme lately has been to try to get (especially new) users used to showing their efforts when they ask questions.
Great to have you back, @Matterwave -- you have been missed!