noun
- A law stating that the orbit of each planet is an ellipse with the sun at one focus of the ellipse. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). kepler's first law. Retrieved September 29, 2026, from http://smartdefine.org/kepler%27s_first_law/definitions/1214463 |
| Chicago | WordNet. 2010. "kepler's first law" http://smartdefine.org/kepler%27s_first_law/definitions/1214463 (accessed September 29, 2026). |
| Harvard | WordNet 2010, kepler's first law, Smart Define, viewed 29 September, 2026, <http://smartdefine.org/kepler%27s_first_law/definitions/1214463>. |
| MLA | WordNet. "kepler's first law" 23 October 2010. Web. 29 September 2026. <http://smartdefine.org/kepler%27s_first_law/definitions/1214463> |