Can a black hole form without a parent star?
Rich Livitski
Seal Beach, California
A few different kinds of black holes exist. First are stellar-mass black holes, which can range from 3.3 to 100 times the mass of the Sun. These are the lowest-mass black holes that we’ve observed. One way these black holes form is when the most massive stars in the universe reach the end of their life. Alternatively, a neutron star can become a black hole if it either accretes enough material fro