Moon
- A moon is a large object revolving around a planet
- Roughly $\frac{1}{3}$ of the moons in the outer solar system are in direct orbits
- Regular orbit
- Revolve west --> east
- Major of the moons are irregular
- Retrograde orbit (east --> west)
- Orbit has high eccentricity
- More elliptical than circular
- High inclination
- Moving in and out of the planet's equatorial plane
- Irregular moons are mostly located relatively far from their planet
- Probably formed elsewhere and were captured by the planet
Astronomy Space