https://www.khanacademy.org/science/revision-up-science-class-6-full-term/x00110b31861f2508:week-4/x00110b31861f2508:beyond-earth/v/comets-and-meteors 2025-01-27T07:36:54.139191702Z Comets and Meteors Learn what comets are made of, why their tails always point away from the sun, and explore famous ones like Halley's Comet and Neowise. Also Learn about meteors, meteorites and meteoroids. Joel Prakash Stephen video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Comets and Meteors Learn what comets are made of, why their tails always point away from the sun, and explore famous ones like Halley's Comet and Neowise. Also Learn about meteors, meteorites and meteoroids. https://cdn.kastatic.org/ka-youtube-converted/HszZZjA7jE4.mp4/HszZZjA7jE4.mp4 424 Solar system https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:the-solar-system/e/comets-and-meteors 2026-04-08T00:54:09.631945657Z Comets and Meteors Let's do some questions! vibhor exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:the-solar-system/v/the-solar-system-ms 2024-01-04T21:44:22.995765104Z The solar system Our solar system, formed from a nebula, consists of the sun, eight planets, asteroids, and comets. The inner planets, Mercury, Venus, Earth, and Mars, are rocky, while the outer planets, Jupiter, Saturn, Uranus, and Neptune, are gas giants. The asteroid belt separates these two groups, and the Oort cloud, filled with comets, lies beyond Neptune. Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/b8fab4c8-cc6b-4c1c-808c-ae49dbbe513d_1280_720_base.png The solar system Our solar system, formed from a nebula, consists of the sun, eight planets, asteroids, and comets. The inner planets, Mercury, Venus, Earth, and Mars, are rocky, while the outer planets, Jupiter, Saturn, Uranus, and Neptune, are gas giants. The asteroid belt separates these two groups, and the Oort cloud, filled with comets, lies beyond Neptune. https://cdn.kastatic.org/ka-youtube-converted/wTyqO-tfs7Q.mp4/wTyqO-tfs7Q.mp4 296 Solar system https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:the-solar-system/v/bhp-solar-system-earth-crashcourse 2023-07-02T10:05:56.724382666Z WATCH: The Solar System & the Earth Emily Graslie joins John and Hank Green to discuss the formation of our Sun, Solar System, and Earth - and how it's all slightly more interesting than leftover crumbs and clam chowder. Learn how we're all essentially 'lava surfers' as you investigate how geological processes related to plate tectonics shape our daily lives. Big History Project video https://cdn.kastatic.org/googleusercontent/TFRYXa3TLBp6QuPZjmAvUFPZqOY2pAXt4cGiZwPFHCHroMulqY9RcfNU-SachRYh5lRaE5NcmbiByGeBx2vXYCX4 WATCH: The Solar System & the Earth Emily Graslie joins John and Hank Green to discuss the formation of our Sun, Solar System, and Earth - and how it's all slightly more interesting than leftover crumbs and clam chowder. Learn how we're all essentially 'lava surfers' as you investigate how geological processes related to plate tectonics shape our daily lives. https://cdn.kastatic.org/ka-youtube-converted/yf6YvGb83H4.mp4/yf6YvGb83H4.mp4 841 Solar system https://www.khanacademy.org/science/9th-grade-science-matatag/xc6c9cbcd628f26fe:2nd-quarter-earth-and-space-science/xc6c9cbcd628f26fe:solar-system/v/bhp-threshold4 2023-07-02T10:05:56.724382666Z WATCH: Threshold 4 — Earth & Solar System Clouds of diverse, chemical matter spun around our Sun, coming together to form our Earth and Solar System. Discover how the universe's atomic matter, primarily hydrogen and helium, combines to form complex objects like planets. Explore the process of accretion, where atoms and molecules clump together, forming diverse celestial bodies, and learn about the formation of Earth, rich in oxygen, silicon, aluminum, and iron, and its unique place in the cosmos. Big History Project video https://cdn.kastatic.org/googleusercontent/mg7w2KeuB4tQdi-iUHzWsHUJ4slFRewcKjEg6v9fdtzRjYEiy2ULF7H8akc8FrD0m2qMU-8tKxeaizf32Vq7GHt0 WATCH: Threshold 4 — Earth & Solar System Clouds of diverse, chemical matter spun around our Sun, coming together to form our Earth and Solar System. Discover how the universe's atomic matter, primarily hydrogen and helium, combines to form complex objects like planets. Explore the process of accretion, where atoms and molecules clump together, forming diverse celestial bodies, and learn about the formation of Earth, rich in oxygen, silicon, aluminum, and iron, and its unique place in the cosmos. https://cdn.kastatic.org/ka-youtube-converted/fY0jAVfmcqM.mp4/fY0jAVfmcqM.mp4 170 Solar system https://www.khanacademy.org/science/9th-grade-science-matatag/xc6c9cbcd628f26fe:2nd-quarter-earth-and-space-science/xc6c9cbcd628f26fe:solar-system/a/threshold-card-threshold-4-earth-the-solar-system 2023-02-23T03:02:14.778510718Z ACTIVITY: Threshold Card —Threshold 4 Earth & the Solar System article https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:the-solar-system/e/understand-the-solar-system 2026-06-12T11:30:42.866445152Z Understand: The solar system Check your understanding of the solar system in this set of free practice questions aligned to NGSS standards. Lauren Rosebrugh exercise https://www.khanacademy.org/science/strengthened-shs-earth-and-space-science-1/x006d5d274c051fd7:origin-and-structure-of-the-earth/x006d5d274c051fd7:a-brief-history-of-the-earth/v/bhp-how-did-earth-solar-system-form 2023-07-02T10:05:56.724382666Z WATCH: How Did Earth and the Solar System Form? Explore the fascinating process of how chemistry and celestial events combined to form our solar system. Learn about the role of elements, molecules, and the intense heat of the young sun in creating the diverse and complex structures of planets, including our own Earth. Big History Project video https://cdn.kastatic.org/googleusercontent/bxrdDTiJ8vKI0rvfhhFHBE6yjbR6zSRS0yftEQJ4mzYE2G0J9ayiDeCzTEPZOogoXe8a1WGJpThfO6lms34wS7bq WATCH: How Did Earth and the Solar System Form? Explore the fascinating process of how chemistry and celestial events combined to form our solar system. Learn about the role of elements, molecules, and the intense heat of the young sun in creating the diverse and complex structures of planets, including our own Earth. https://cdn.kastatic.org/ka-youtube-converted/QgVwzm3u3mc.mp4/QgVwzm3u3mc.mp4 726 Solar system https://www.khanacademy.org/science/strengthened-shs-earth-and-space-science-1/x006d5d274c051fd7:origin-and-structure-of-the-earth/x006d5d274c051fd7:a-brief-history-of-the-earth/e/quiz--earth---the-formation-of-our-solar-system 2021-04-29T07:51:56Z Quiz: Earth & the Formation of Our Solar System Quiz 4.0 Jay Heins exercise https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:the-solar-system/a/how-our-solar-system-formed 2023-05-05T21:01:11.640988085Z READ: How Our Solar System Formed article https://www.khanacademy.org/science/9th-grade-science-matatag/xc6c9cbcd628f26fe:2nd-quarter-earth-and-space-science/xc6c9cbcd628f26fe:solar-system/a/gallery-earth-solar-system 2023-05-05T21:01:11.640988085Z READ: Gallery — Earth & Solar System article https://www.khanacademy.org/science/cosmology-and-astronomy/universe-scale-topic/scale-earth-galaxy-tutorial/v/scale-of-solar-system 2021-04-04T12:52:27Z Scale of solar system Sal Khan describes the scale of our Solar System. Sal Khan video https://cdn.kastatic.org/googleusercontent/pg-QIJ0p8PflsKlCSnY15FrrsLsVkeOTBtUyWe6xRvHONT5RrdeG68tAjAG0GZaSL3kabjHEZD8teWtvoA3gs9Nl-g Scale of solar system Sal Khan describes the scale of our Solar System. https://cdn.kastatic.org/ka-youtube-converted/GP53b__h4ew.mp4/GP53b__h4ew.mp4 751 Solar system https://www.khanacademy.org/science/cambridge-o-level-physics-cie/x0e04e0cb682fb793:space-science/x0e04e0cb682fb793:the-solar-system/a/the-solar-system 2026-04-27T10:30:47.716252349Z Key points: The solar system Review your understanding of the solar system in this free article aligned to NGSS standards. article https://www.khanacademy.org/science/9th-grade-science-matatag/xc6c9cbcd628f26fe:2nd-quarter-earth-and-space-science/xc6c9cbcd628f26fe:solar-system/a/glossary-our-solar-system-earth 2021-04-29T07:59:28Z Glossary: Our Solar System & Earth article