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The Black Hole Encyclopedia
Explore an interactive encyclopedia of known and suspected black holes and find out how they are formed. Includes a glossary of terms, movie files and links to black holes in popular movies and books.
Wikimedia
Wikipedia: The Black Hole
This site examines the black hole as an object in astrophysics. Delve into this comprehensive resource that covers this concept from its history, to qualitative physics, the reality of black holes, mathematical physics and more.