A black hole is a very odd thing; a remnant of an old star, it has mass but no atoms. The stuff of which it is made is so dense that it warps space and time; no ordinary matter can escape its enormous a rel='nofollow' href="https://sciencing.com/gravitational-pull-6300673.html"gravitational pull/a, not even light. Because you cannot see a black hole directly, scientists can only observe them through their effects on nearby stars.
A black hole is a very odd thing; a remnant of an old star, it has mass but no atoms. The stuff of which it is made is so dense that it warps space and time; no ordinary matter can escape its enormous a rel='nofollow' href="https://sciencing.com/gravitational-pull-6300673.html"gravitational pull/a, not even light. Because you cannot see a black hole directly, scientists can only observe them through their effects on nearby stars.