Complex sentence: J002E3 is the designation given to an asteroid discovered by amateur astronomer Bill Yeung on September 3,2002 that may be the S-IVB third stage of the Apollo 12 Saturn V rocket (though there is currently no positive proof of the object's identity).
Split into simpler sentences: J002E3 is the designation given to an asteroid discovered by amateur astronomer Bill Yeung on September 3,2002. There is some evidence that may be the S-IVB third stage of the Apollo 12 Saturn V rocket (though there is currently no positive proof of the object's identity).