Black Holes

The following citations listed in this article are from What Is a Black Hole? | NASA.

    According to previously cited sources, "A black hole is a place in space where gravity pulls so much that even light can not get out." This phenomenon happens because its gravity is extremely powerful, due to the immense density of the compacted high-mass star. At this stage of life, the star is dying. However they are depicted in movies and images, black holes are invisible, and can not be seen by the human eye without special tools and telescopes.

    Black holes come in all different shapes and sizes, although they tend to appear circular. The smallest black hole scientists have discovered is said to be the size of a singular atom. However small a black hole is, its mass is still very obtuse, and have similar mass levels to a mountain. Some of these phenomena, specifically called stellars, can have masses of up to 20 times the amount of our Sun's mass! 

Image Credits: Black Holes: Journey into the Unknown | Maryland Science Center

    Large enough black holes are called supermassive because, well, they're super massive! According to previously cited sources, supermassive black holes can have masses "that are more than 1 million suns together." Did you know that in every galaxy, a supermassive black hole is located at around the origin? Eventually, this black hole will swallow up everything around it, like planets and their light.

Image Credits: Scientists Reveal Past Outburst from the Supermassive Black Hole at the Center of Our Galaxy

    Unfortunately, we know very little about black holes. Nobody has ever tested what would happen (intentionally) if we were to enter one, but there are many existent theories out there. What we do know is that they are dangerous but incredibly fascinating.