This object may have been created because of a collision with the ancient planet Theia [THAYÂ­ah].
This object may have been created because of a collision with the ancient planet Theia [THAYÂ­ah]. This astronomical object is in synchronous orbit around its planet, and contains plains known as (*) "marias" [MAHÂ­reeÂ­ahs], which include the Sea of Tranquility. For 10 points, name this satellite of Earth, which was walked on by Neil Armstrong.
This object may have been created because of a collision with the ancient planet Theia [THAYÂ­ah].
moon (accept Luna)