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This is unknown. In 1916, Einstein predicted their existence in his theory of general relativity. Then a few months later the physicist Karl Schwarzschild calculated that Einstein's predictions were right. No one has ever seen a black hole because they emit no light, but we can tell that they are at the centre of almost every galaxy because they pull in all the light around them.
What else can I help you with?
When was Return to the Black Hole created?
Return to the Black Hole was created in 1997.
When was Kids of the Black Hole created?
Kids of the Black Hole was created in 1981.
When was Black Hole Entertainment created?
Black Hole Entertainment was created in 2002.
When was Black Hole - comics - created?
Black Hole - comics - was created in 2005.
When was Beyond the Black Hole created?
Beyond the Black Hole was created in 2001.
When was Black Hole Recordings created?
Black Hole Recordings was created in 1997.
When was The Black Hole of Auschwitz created?
The Black Hole of Auschwitz was created in 2002.
When was Black Hole Sun created?
Black Hole Sun was created in 1994-05.
When was Songs from the Black Hole created?
Songs from the Black Hole was created in 1994-12.
When was Black Hole - video game - created?
Black Hole - video game - was created in 1981.
When was What Remains Inside a Black Hole created?
What Remains Inside a Black Hole was created in 1996.
When was Black Hole Recordings discography created?
Black Hole Recordings discography was created in 1997.
