How close is the nearest black hole to Earth?

All across the Universe, massive stars collapse and die. <img alt="" src="https://miro.medium.com/v2/resize:fit:700/0*xBSTJOGRs9cmzwUw" style="height:488px; width:700px" /> The anatomy of a very massive star throughout its life, culminating in a Type II Supernova when the core runs out of nuclear fuel. The final stage of fusion is typically silicon-burning, producing iron and iron-like elements in the core for only a brief while before a supernova ensues. If the core of this star is massive enough, it will produce a black hole when the core collapses. (<a href="https://www.nsf.gov/news/mmg/mmg_disp.jsp?med_id=66679&from=" rel="noopener ugc nofollow" target="_blank">Credit</a>: Nicolle Rager Fuller/NSF) <a href="https://medium.com/starts-with-a-bang/how-close-is-the-nearest-black-hole-to-earth-bf272be43a81">Read More</a>