The moon

 In night, we can see moon over the sky. We can't see many stars because of light pollution, but we can see bright moon. Moon is the Earth's one non-artificial satellite. Let's learn about moon's characteristic.



1.Moon's orbit's characteristic

Perigee:363295km
Apogee:405503km
Orbital period:27days,7hours,43minutes
Synodic period:29days, 12hours, 44minutes

2.Moon's physical characteristic


Mean radius:1737km
Flattening:0.00125
Surface area:3.793 × 10⁷ km² 
Volume:2.1958 × 10¹⁰ km³
Mass:7.3477 × 10²² kg 
Mean density: 3.3464 g/cm³
Minimum temperature:100K
Mean temperature:220K
Maximum temperature:230K