https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:life-cycle-of-a-star/v/stars-and-galaxies-ur 2025-08-08T00:50:08.705567982Z Stars and Galaxies Created by Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Stars and Galaxies Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/kuvJ4Ckyp0A.mp4/kuvJ4Ckyp0A.mp4 430 Life cycle of a star https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:life-cycle-of-a-star/a/what-is-a-galaxy 2025-05-30T05:36:16.508578301Z What Is a Galaxy? article https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:life-cycle-of-a-star/a/what-is-a-star 2025-06-10T13:35:50.832432202Z What is a Star? article https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:life-cycle-of-a-star/a/formation-and-evolution-of-galaxies 2023-07-06T18:33:28.586154171Z Formation and Evolution of Galaxies article https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:life-cycle-of-a-star/e/quiz-galaxies 2026-04-08T00:54:09.631945657Z Quiz: Galaxies American Museum of Natural History exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:life-cycle-of-a-star/a/lives-of-stars 2025-11-18T19:31:12.037809628Z Lives of Stars article https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/birth-of-stars 2023-12-18T19:15:22.874322042Z Birth of stars Stars are formed from massive clouds of hydrogen atoms in space. Under intense pressure and temperature, these atoms undergo fusion, combining to form helium and releasing energy. This energy provides an outward pressure, preventing the star from collapsing, thus creating a star. Sal Khan video https://cdn.kastatic.org/googleusercontent/0Y-r8HEkIUvwudygoI6Svg9Ig-6-hx0d7_rwfPtrmN6ZIQ4WJM0junNSu917a3bWesymJgYikQk601dYwF4hPPN1 Birth of stars Stars are formed from massive clouds of hydrogen atoms in space. Under intense pressure and temperature, these atoms undergo fusion, combining to form helium and releasing energy. This energy provides an outward pressure, preventing the star from collapsing, thus creating a star. https://cdn.kastatic.org/ka-youtube-converted/i-NNWI8Ccas.mp4/i-NNWI8Ccas.mp4 478 Life cycle of a star https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:life-cycle-of-a-star/e/birth-of-a-star 2026-04-08T00:16:02.937952483Z Birth of a star An exercise on the birth of a star designed for middle school learners. Joel Prakash Stephen exercise https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/star-field-and-nebula-images 2021-04-04T12:52:27Z Star field and nebula images Star Field and Nebula Images Sal Khan video https://cdn.kastatic.org/googleusercontent/WxTg37Lua4UNqa0A4sowDbUUvSl8XJuHa_wfkS0MhUXGJVJtsJ4cF9iV1yfgz2AHaP1Ml53oSaOQLteExzqNXGUg Star field and nebula images Star Field and Nebula Images https://cdn.kastatic.org/ka-youtube-converted/w3IKEa_GOYs.mp4/w3IKEa_GOYs.mp4 424 Life cycle of a star https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/becoming-a-red-giant 2021-04-04T12:52:27Z Becoming a red giant Becoming a Red Giant Sal Khan video https://cdn.kastatic.org/googleusercontent/XTyAHbv8tbkHm__8PJcAncexkehf1Ro2FjZKtIPjYGG993utMZ1CHXVPD6WQrRTSzlyZvyU67I7k5zswLule1Ip7 Becoming a red giant Becoming a Red Giant https://cdn.kastatic.org/ka-youtube-converted/kJSOqlcFpJw.mp4/kJSOqlcFpJw.mp4 690 Life cycle of a star https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/white-and-black-dwarfs 2021-04-04T12:52:27Z White and black dwarfs White and Black Dwarfs Sal Khan video https://cdn.kastatic.org/googleusercontent/GlQ-6GBgAUkSOjtzBSRWsOFUyVDxqGE2imVGcgZ-1GazMl4QwQCGopmJqIP6FUkHK2YzZbocXMlF7e3mt0vvVo4e White and black dwarfs White and Black Dwarfs https://cdn.kastatic.org/ka-youtube-converted/EdYyuUUY-nc.mp4/EdYyuUUY-nc.mp4 774 Life cycle of a star https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/lifecycle-of-massive-stars 2023-12-18T19:15:22.874322042Z Lifecycle of massive stars Massive stars begin as large hydrogen clouds that condense under gravity. They burn hotter and faster than smaller stars, undergoing fusion to create heavier elements. This fusion process continues until iron is formed. Beyond iron, fusion requires energy, leading to a supernova. Sal Khan video https://cdn.kastatic.org/googleusercontent/qbAPIsR04BP0_ea5Pl7fVZSzCFheg8ZNKZCyXuS5JEKPh6ILJZRp1hVU3KhiKWv52QCfDUfNsBmHkPGUubuEMT9I Lifecycle of massive stars Massive stars begin as large hydrogen clouds that condense under gravity. They burn hotter and faster than smaller stars, undergoing fusion to create heavier elements. This fusion process continues until iron is formed. Beyond iron, fusion requires energy, leading to a supernova. https://cdn.kastatic.org/ka-youtube-converted/UhIwMAhZpCo.mp4/UhIwMAhZpCo.mp4 401 Life cycle of a star https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/supernova-supernovae 2023-12-18T19:15:22.874322042Z Supernova (supernovae) A supernova is a powerful explosion of a massive star at the end of its life cycle. This event releases an enormous amount of energy, temporarily outshining an entire galaxy. It also disperses heavier elements formed during the star's life and the explosion itself into the universe. Sal Khan video https://cdn.kastatic.org/googleusercontent/sMX6Rt_JHmyfPkLGjPNTytlDNqAfM0sA88ehAF28e94SSI7UWOyH-PyjXih4W69kptHBpzNzwGTQS-xsnlzG6dVE Supernova (supernovae) A supernova is a powerful explosion of a massive star at the end of its life cycle. This event releases an enormous amount of energy, temporarily outshining an entire galaxy. It also disperses heavier elements formed during the star's life and the explosion itself into the universe. https://cdn.kastatic.org/ka-youtube-converted/qOwCpnQsDLM.mp4/qOwCpnQsDLM.mp4 718 Life cycle of a star https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/supernova-clarification 2020-06-23T07:22:42Z Supernova clarification Supernova clarification Sal Khan video https://cdn.kastatic.org/googleusercontent/QqXQ3D3O39D9CWIlGYMy-ALHBhrzMtYwnOxjhkJXx9ZhauvwUy084dLMPC4lQh9l2BPhwKNpKKMzbAaygZjS3oI Supernova clarification Supernova clarification https://cdn.kastatic.org/ka-youtube-converted/QMv4kxATfzs.mp4/QMv4kxATfzs.mp4 92 Life cycle of a star https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/black-holes 2021-04-04T12:52:27Z Black holes Black Holes Sal Khan video https://cdn.kastatic.org/googleusercontent/0aqpyoz06pt5b8zSQWMdythNqf1oFWM9eEeyFDUM6NRMf5PXhW2moqnEeZHmirzDc1J1rdhfHy7VIwygkw4xBOsH Black holes Black Holes https://cdn.kastatic.org/ka-youtube-converted/JoL2pO3O0rg.mp4/JoL2pO3O0rg.mp4 609 Life cycle of a star https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:life-cycle-of-a-star/e/death-of-a-star 2026-04-07T23:55:07.30621384Z Death of a Star An exercise for middle school students about the process of death of a star. Joel Prakash Stephen exercise https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/stellar-life-death-tutorial/v/supermassive-black-holes 2021-04-04T12:52:27Z Supermassive black holes Supermassive Black Holes Sal Khan video https://cdn.kastatic.org/googleusercontent/p0jaGr-fQOTrHxawlVnvt58voWiVqQrA7zDwHQOFOSaEp9QYmP6fQF1SZKfHWa7jzn-UfvnXzZ2Rs-IJfpWLMJA Supermassive black holes Supermassive Black Holes https://cdn.kastatic.org/ka-youtube-converted/DxkkAHnqlpY.mp4/DxkkAHnqlpY.mp4 568 Life cycle of a star https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:life-cycle-of-a-star/e/stars-and-their-life-cycle 2026-04-07T22:59:30.107127435Z Stars and their life-cycle Let's practice vibhor exercise