Black Holes
Black Holes introduces students to essential astronomy ideas through observation, evidence, vocabulary, and real examples.
Gravity at an Extreme
A black hole is a region where gravity is so strong that crossing the event horizon means nothing can return, not even light. Outside that boundary, black holes still obey gravity like other massive objects.
How We Detect Them
Astronomers infer black holes from hot accretion disks, stars orbiting unseen masses, gravitational waves, and the shadows cast by supermassive black holes.
Did You Know?
Black Holes connects to everyday science because the same laws of motion, energy, and matter apply on Earth and across space.
Knowledge Check
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