https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:earth-in-space/x87d03b443efbea0a:galaxies-and-gravity/v/galaxies-and-gravity 2022-09-10T03:34:09.940758862Z Galaxies and gravity Earth is part of the solar system, which is part of a galaxy, which is part of a galaxy group. All of these systems are held together by gravity, a force that pulls objects with mass toward each other. Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/1b98d857-37f2-4764-9e8e-84ae4dab4476_1280_720_base.png Galaxies and gravity Earth is part of the solar system, which is part of a galaxy, which is part of a galaxy group. All of these systems are held together by gravity, a force that pulls objects with mass toward each other. https://cdn.kastatic.org/ka-youtube-converted/tNGVqoOLl-k.mp4/tNGVqoOLl-k.mp4 235 Gravitational force https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:earth-in-space/x87d03b443efbea0a:galaxies-and-gravity/a/galaxies-and-gravity 2026-04-26T16:30:39.382257956Z Key points: Galaxies and gravity Review your understanding of galaxies and gravity 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:galaxies-and-gravity/e/understand-galaxies-and-gravity 2026-04-26T16:30:39.382257956Z Understand: Galaxies and gravity Check your understanding of galaxies and gravity in this set of free, standards-aligned practice questions. Lauren Rosebrugh exercise https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:earth-in-space/x87d03b443efbea0a:galaxies-and-gravity/e/apply-galaxies-and-gravity 2026-04-26T16:30:39.382257956Z Apply: Galaxies and gravity Apply your understanding of galaxies and gravity in this set of free, standards-aligned practice questions. Lauren Rosebrugh exercise