If your significant other isn't answering your phone call and it's been 9 nights in a row and they're not calling you or answering your phone daytime phone calls what's the reason this is happening and you know for sure that they're health is good?

Maybe you should try contacting his/her parents and seeing whats going on or unfortunatly he could've broke up with you without actually telling you he broke up with you.

giant impact theory - the moon was formed from the collision between earth and another mars-sized body.

colliding planetesimals hypothesis - the moon was formed from the same cloud of material as earth.

capture hypothesis - the moon was locked into orbit by earths gravity as it was passing by it.

accretion hypothesis - the moon was formed from collisions and combining of planetesimals.

i think this is right, if not and you know better let me know.