https://www.khanacademy.org/science/grade-12-physics-snc-aligned/xe5ce5527f6f71ade:cosmology/xe5ce5527f6f71ade:stellar-luminosity-flux-and-distance-measurement/v/what-happens-to-the-stars-during-the-day 2025-12-02T18:10:41.506336784Z What happens to the stars during the day? Meet Jackie Faherty, an astrophysicist at the American Museum of Natural History. She explains that our Solar System contains far more than just the Earth, Sun, and other planets. There are millions of asteroids and comets in areas called the asteroid belt and Oort Cloud. Archive Credits: Artem Peretiatko/iStock Artem Peretiatko/iStock NASA Goddard Music Credits: "Mistake" by Terry Day (PRS)/Warner Chappell Production Music "Take It Easy" by Anthony Young (PRS)/Warner Chappell Production Music All other imagery © American Museum of Natural History. American Museum of Natural History video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw What happens to the stars during the day? Meet Jackie Faherty, an astrophysicist at the American Museum of Natural History. She explains that our Solar System contains far more than just the Earth, Sun, and other planets. There are millions of asteroids and comets in areas called the asteroid belt and Oort Cloud. Archive Credits: Artem Peretiatko/iStock Artem Peretiatko/iStock NASA Goddard Music Credits: "Mistake" by Terry Day (PRS)/Warner Chappell Production Music "Take It Easy" by Anthony Young (PRS)/Warner Chappell Production Music All other imagery © American Museum of Natural History. https://cdn.kastatic.org/ka-youtube-converted/BgFl9e31Z5s.mp4/BgFl9e31Z5s.mp4 229 Stellar luminosity, flux, and distance measurement https://www.khanacademy.org/science/grade-8-science-snc-aligned/xa9b0f40dbc1bb08e:our-universe/xa9b0f40dbc1bb08e:galaxies-and-the-stars/a/what-is-a-star 2025-06-10T13:35:50.832432202Z What is a Star? article https://www.khanacademy.org/science/electrical-engineering/ee-electrostatics/ee-electric-force-and-electric-field/a/ee-inverse-square-law 2025-06-30T13:24:56.290137498Z Inverse square law The fable of the butter gun. Intuitive explanation of the inverse square law. article https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/cepheid-variables/v/cepheid-variables-1 2021-04-12T12:34:15Z Cepheid variables 1 Cepheid Variables 1 Sal Khan video https://cdn.kastatic.org/googleusercontent/VVetCqB5ukIlzkbqoL2TiqaPzH2dl4uHi0YLgmOOisSmpCOiTS3weq3O1S1glfvCvfIt8NiMNjkPKtZDl3C88SI Cepheid variables 1 Cepheid Variables 1 https://cdn.kastatic.org/ka-youtube-converted/BWs-ONRDDG4.mp4/BWs-ONRDDG4.mp4 563 Stellar luminosity, flux, and distance measurement https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/cepheid-variables/v/why-cepheids-pulsate 2021-04-26T14:33:10Z Why cepheids pulsate Why Cepheids Pulsate Sal Khan video https://cdn.kastatic.org/googleusercontent/A1eENfktcsu29QFftqOjaSMO5zVle0AeakwImwsC3pFrLTtt4JnqKJugfyR0585R3UBLJUCBjctTyIZVgOVagogGWg Why cepheids pulsate Why Cepheids Pulsate https://cdn.kastatic.org/ka-youtube-converted/X_3QAB3o4Vw.mp4/X_3QAB3o4Vw.mp4 430 Stellar luminosity, flux, and distance measurement https://www.khanacademy.org/science/cosmology-and-astronomy/stellar-life-topic/cepheid-variables/v/why-gravity-gets-so-strong-near-dense-objects 2021-04-12T12:34:15Z Why gravity gets so strong near dense objects Why Gravity Gets So Strong Near Dense Objects Sal Khan video https://cdn.kastatic.org/googleusercontent/bdZx6RncmyBxog--3JfN_t98an1n2fysX8WZZzJK9jttnL5Qy50oddaV3wJ0AZGA0xUmdPrW_H3Ghz48MJ2ff9PnZA Why gravity gets so strong near dense objects Why Gravity Gets So Strong Near Dense Objects https://cdn.kastatic.org/ka-youtube-converted/RpOHZc6cDIw.mp4/RpOHZc6cDIw.mp4 493 Stellar luminosity, flux, and distance measurement