Jason Nishiyama
Johannes Kepler devised three laws of planetary motion. The first law (Kepler I) is that the planets orbit the Sun in ellipses, with the Sun at one of the foci.
These laws apply to any orbiting body, satellites around a planet; planets around stars; stars around galaxies.
Jonkman Microblog is a social network, courtesy of SOBAC Microcomputer Services. It runs on GNU social, version 1.2.0-beta5, available under the GNU Affero General Public License.
All Jonkman Microblog content and data are available under the Creative Commons Attribution 3.0 license.