Or for example because length contracts based on speed it's possible for something to look like a black hole if you are moving fast, but not be a black hole if

Or for example because length contracts based on speed it's possible for something to look like a black hole if you are moving fast, but not be a black hole if you are moving slow. How does length contraction make something "look" like a black hole? Gravitational force generated by an object cannot possibly change based on what an observer measures its length to be; No matter how fast or slow the observer is moving. I don't know an awful lot of physics. For me, it appears that you are either intentionally throwing up random stuff to confuse others, or you are yourself confused. [No offense meant]