ផែនដី៖ ភាពខុសគ្នារវាងកំណែនានា

 

== ប្រវត្តិ ==

 

[[Age of the Earth|ផែនដី]] និង[[ភព]]ដទៃទៀតបានកកើតឡើងតាំងពីជាង 4.6 - 4.8 billion ឆ្នាំមុនមកម៉្លេះ ។<ref name="age_earth" /> They were made of the leftover [[gas]] from the [[nebula]] that [[Formation and evolution of the Solar System|made the Sun]]. The Moon may have been formed after a collision between Earth and a smaller planet (sometimes called ''Theia''). Scientists believe that parts of both planets broke off — becoming (by [[gravity]]) the Moon.<ref>{{cite web|url=http://www.nature.com/nature/journal/v412/n6848/abs/412708a0.html|title=Origin of the Moon in a giant impact near the end of the Earth's formation|accessdate=2009-07-28|publisher=Nature.com}}</ref>