Moon is roughly a quarter size of Earth:
The Moon-Earth size ratio is roughly 1:3.7
- 🌙 Circumference of Moon = 10'917 km - its diameter being approximately 3'475 km.
🌏 Circumference of Earth = 40'075 km - its diameter being approximately 12'756 km.
The Earth-Moon distance averages about 384'400 kms. That's roughly 30 times the diameter of Earth. But this distance varies because the Moon's orbit is in an ellipse, being closest (perigee) around 363'100 km {28 x the diameter of Earth} and farthest (apogee) at roughly 405'700 km {32 x the diameter of Earth}. This is not a perfect circle, but instead an ellipse with an average eccentricity of about 0.055.
Refer to my blog about Earth's eccentricity & an explanation of perihelion vs perigee.
