Moon was produced by a head-on collision between Earth and a forming planet Prison Planet.com Posted on January 29, 2016 Posted in Aggregated No Comments Tagged with Sci Tech EurekAlert | UCLA-led research reconstructs massive crash, which took place 4.5 billion years ago. Share this:Share Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email