https://www.khanacademy.org/science/grade-7-science-cambridge-curriculum/x754b285620daf71e:earth-and-space/x754b285620daf71e:earth-and-solar-system/v/why-earth-is-unique-earth 2026-04-30T07:30:36.209464894Z Why Earth is unique - Earth Why Earth is unique Khan Academy Pakistan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Why Earth is unique - Earth Why Earth is unique https://cdn.kastatic.org/ka-youtube-converted/urUDy2Hj07k.mp4/urUDy2Hj07k.mp4 396 Earth and solar system https://www.khanacademy.org/science/grade-7-science-cambridge-curriculum/x754b285620daf71e:earth-and-space/x754b285620daf71e:earth-and-solar-system/a/how-was-our-solar-system-formed 2025-07-05T01:14:45.343127054Z How Was Our Solar System Formed? article https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:earth-in-space/x87d03b443efbea0a:earths-place-in-the-universe/v/earths-place-in-the-universe 2024-01-04T21:44:22.995765104Z Earth's place in the universe Humans have used models to understand Earth's place in the universe. The geocentric model, placing Earth at the center, was replaced by the heliocentric model, with the sun at the center. This change better explains the movement of celestial bodies and shows that Earth's rotation causes the sun's apparent motion. Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/367f5f88-2954-4708-a8a2-1ea2aa569771_1280_720_base.png Earth's place in the universe Humans have used models to understand Earth's place in the universe. The geocentric model, placing Earth at the center, was replaced by the heliocentric model, with the sun at the center. This change better explains the movement of celestial bodies and shows that Earth's rotation causes the sun's apparent motion. https://cdn.kastatic.org/ka-youtube-converted/Pv0Re0YEEq0.mp4/Pv0Re0YEEq0.mp4 294 Earth and solar system https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:earth-in-space/x87d03b443efbea0a:earths-place-in-the-universe/a/earths-place-in-the-universe 2026-04-29T10:50:35.589391704Z Key points: Earth’s place in the universe Review your understanding of Earth's place in the universe in this free article aligned to NGSS standards. article https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:earth-in-space/x87d03b443efbea0a:earths-place-in-the-universe/e/understand-earths-place-in-the-universe 2026-03-11T01:50:44.937458787Z Understand: Earth's place in the universe Check your understanding of Earth's place in the universe in this set of free practice questions aligned to NGSS standards. Lauren Rosebrugh exercise https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:earth-in-space/x87d03b443efbea0a: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 Earth and solar system https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:earth-in-space/x87d03b443efbea0a: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/grade-7-science-cambridge-curriculum/x754b285620daf71e:earth-and-space/x754b285620daf71e:earth-and-solar-system/a/features-of-planets 2023-07-06T18:33:28.586154171Z Features of Planets article https://www.khanacademy.org/science/grade-7-science-cambridge-curriculum/x754b285620daf71e:earth-and-space/x754b285620daf71e:earth-and-solar-system/a/exploration-questions-planets 2025-07-09T09:46:12.763333982Z Exploration Questions: Planets article https://www.khanacademy.org/science/grade-7-science-cambridge-curriculum/x754b285620daf71e:earth-and-space/x754b285620daf71e:earth-and-solar-system/a/answers-to-exploration-questions-planets 2025-07-09T09:46:12.763333982Z Answers to Exploration Questions: Planets article https://www.khanacademy.org/science/shs-physical-science/x0492729e402f0c6b:4th-quarter/x0492729e402f0c6b:understanding-the-cosmos/a/the-pluto-controversy-whats-a-planet-anyway 2025-04-10T15:57:44.435689794Z The Pluto Controversy: What's a Planet, Anyway? article https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:earth-in-space/x87d03b443efbea0a:the-solar-system/e/understand-the-solar-system 2026-04-27T10:30:47.716252349Z 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