<p align="right">Last Update: <font color="#4f81bd">July, 22, 2024</font></p> ## BIG IDEAS - Event Horizon - The boundary surrounding a black hole - Singularity - A point at the center of a black hole in which gravitational forces compress matter to infinite density and zero volume. > "an astronomical object with a gravitational pull so strong that nothing, not even [[Electromagnetic radiation|light]], can escape it." Event horizon "first considered in the 18th century by John Michell and Pierre-Simon Laplace." [[PDF] MICHELL, LAPLACE AND THE ORIGIN OF THE BLACK HOLE CONCEPT | Semantic Scholar](https://www.semanticscholar.org/paper/MICHELL%2C-LAPLACE-AND-THE-ORIGIN-OF-THE-BLACK-HOLE-Montgomery-Orchiston/52dc00691edafb7d4b33bb7c0867613dab889913) [[Albert Einstein|Einstein's]] theory of General Relativity predicts black holes. --- Return [[Home|Home]] | [[The Universe]] | [[The Big Bang|The Big Bang Theory]] | [[Solar System]] | [[Galaxies]] | [[Star Clusters]] | [[Superclusters]] | [[Black Holes]]