Yes. In the neighborhood of a black hole, both time and space are distorted, due to the black hole's strong gravitational attraction.
They will remain as black holes for a long, long time.
that is something that you would have to decide for yourself because it is a strongly debated subject
Black holes are created from something extremely dense in a small space. The most common cause is a supernova.
No, this is not something material like a table or a chair. Black holes are simply an area in space where gravity is infinite.
None. Black holes are completely black, making them invisible, so it would be pointless to put something you can't see in a constellation.
Black holes. They can be so large that they can suck up universes at a time
Black holes do distort time. The closer you get to the event horizon of a black hole, the slower time goes. From the perspective of someone outside, time at the event horizon stops.
At any time.
Black holes were stars that were so massive that they collapsed on itself. The gravity in black holes is infinite and more you get closer to it, more time gets slower. Black holes suck all matter that is too close. Even light can't escape Black holes.
Science at this time can find no end to black holes. They seem to last forever.
Can black holes alter time? Probably... I mean a black hole interfears with time and space... maybe... just maybe.... we could go either to the future or back to the... past.
I am not sure what you mean; "altitude" is not something commonly associated with black holes.