The neighborhoodDefinedTerm
Opposition
When a planet is opposite the Sun in Earth's sky — up all night.
Best time to observe outer planets. Mars oppositions occur roughly every 26 months.
Used in these guides
- Why Orbits Work: Kepler's Three Laws in Plain LanguageThe neighborhood
- The Moon's Phases, Finally Explained ProperlyThe neighborhood
- Comets, Asteroids, and Meteors: What's the Difference?The neighborhood
- Ptolemy to Copernicus: Moving the Center of the UniverseHow we learned where we are
- Galileo's Telescope: Four Moons That Changed EverythingHow we learned where we are