: It details how we "see" something invisible. Because black holes are black against the blackness of space, they are impossible to see directly. Instead, scientists look for indirect evidence:
: Moving beyond the image of "cosmic vacuum cleaners," the series argues black holes are essential to the universe's structure , regulating galaxy growth and even sparking star formation through powerful jets. Critical Perspective "How the Universe Works" Are black holes real(2...
: Ripples in spacetime from massive collisions, which the episode presents as some of the strongest evidence for black holes. : It details how we "see" something invisible