https://padlet.com/wangs5/rr8fqbb8023y Made with a quick smile en-us 2018-02-06 14:07:35 UTC 2025-12-02 20:44:16 UTC hello@padlet.com wangs5 https://padlet.com/wangs5/rr8fqbb8023y/wish/228596458 All planets move about the Sun in elliptical orbits, having the Sun as one of the foci.]]> 2018-02-06 14:09:22 UTC https://padlet.com/wangs5/rr8fqbb8023y/wish/228596458 wangs5 https://padlet.com/wangs5/rr8fqbb8023y/wish/228602232 The line between the sun and the planet sweeps equal areas in equal times.]]> 2018-02-06 14:17:24 UTC https://padlet.com/wangs5/rr8fqbb8023y/wish/228602232 wangs5 https://padlet.com/wangs5/rr8fqbb8023y/wish/228608503 The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit.]]> 2018-02-06 14:26:24 UTC https://padlet.com/wangs5/rr8fqbb8023y/wish/228608503