Crash Course
Crash Course Astronomy #33: Black Holes
Stellar mass black holes form when a very massive star dies, and its core collapses. Black holes come in different sizes, but for all of them, the escape velocity is greater than the speed of light, so nothing can escape, not matter or...
Crash Course
Crash Course Astronomy #40: Gamma Ray Bursts
Gamma-ray bursts are not only incredible to study, but their discovery has an epic story all its own. Today Phil takes you through some Cold War history and then dives into what we know. Bursts come in two rough varieties: Long and...
Science Friday Initiative
Science Friday: How Astronomers Measured the Edge of a Black Hole
Astronomers have been able to measure where the point of no return is at the edge of a black hole that is 50 million light-years away. Aired Oct. 5, 2012 [12:43 min]
Khan Academy
Khan Academy: Life and Death of Stars: Supermassive Black Holes
A video lecture that reviews the theories of how really large or "supermassive" black holes form. [9:28]
Khan Academy
Khan Academy: Quasars and Galactive Collisions: Quasars
Looks at quasars, which are the active nuclei of galaxies. [9:15]
California Institute of Technology
Spitzer Science Center: Hidden Black Holes
This image, titled "Hidden Black Holes" features two pictures of the same three black holes, one photo one photo by Hubble and the other by both Hubble and Spitzer. The text under the image details various specifics about the picture.
Science Friday Initiative
Science Friday: A New Type of Black Hole
Researchers discuss how they may have discovered a new type of black hole. This finding would mean the massive gravity sinks can exist in new size, a 'medium' size. Learn what this discovery means for our study of the universe. [12 min,...
Science Friday Initiative
Science Friday: In a Flash of Gamma Rays a Star Is Gone
Was a star eaten by a massive black hole?
Science Friday Initiative
Science Friday: Mysterious Radio Bursts, Sent From Deep Space
Physicists say the distant radio blasts could be traces of evaporating black holes.
Mocomi & Anibrain Digital Technologies
Mocomi: Discovery of Black Holes
Learn about black holes, who discovered them, and the different types.