Labels:crt screen | grandstand | hakham | monitor | plant | sky | stairs | web site | window OCR: File Edit Display Controls Information Events Panels Equa torial Penguin Dictionary of Astronomy Contents Index Back History black holeA region of space where the gravitational force 1 so strong that not even light can escape from t Black holes are formed when matter collapses in on itself catastrophically so that more than critical quantity of mass is concentrated into e particularly small region It is believed that stellar black holes may form when massive stars explode if the central relic is more than three solar masses To create a black hole several solar masses of material would have to be packed into diameter of just afew kilome etres Theory suggests that "mini primordisl black holes might have formed from 1arge density fluctuations in the conditions prevailing in the early universe ...
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