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 Black holes 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 Black holes https://www.khanacademy.org/science/grade-8-science-snc-aligned/xa9b0f40dbc1bb08e:our-universe/xa9b0f40dbc1bb08e:black-holes/v/death-supernova 2023-10-19T01:55:16.79073013Z Death: Supernova High-mass stars die in spectacular explosions called supernovas, as shown in this simulation. A supernova spews more than 90 percent of the star’s mass, including the newly formed heavy elements, out into the galaxy. American Museum of Natural History video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Death: Supernova High-mass stars die in spectacular explosions called supernovas, as shown in this simulation. A supernova spews more than 90 percent of the star’s mass, including the newly formed heavy elements, out into the galaxy. https://cdn.kastatic.org/ka-youtube-converted/kF0wVLTDZxo.mp4/kF0wVLTDZxo.mp4 16 Black holes 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 Black holes 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 Black holes