Huge explosions belched foul gases, but enough about Y!…
Our Moon had an atmosphere visible from space almost four billion years ago – thanks to volcanic eruptions on its surface spewing a concoction of gases at a rate faster than they could escape the heavenly body.…
http://go.theregister.com/feed/www.theregister.co.uk/2017/10/07/the_ancient_moon_had_a_visible_atmosphere_nearly_4_billion_years_ago/