Those seem like moons to me. You can see that all 4 of the moons have a circular orbit designated by the path demonstrated by the screenshot taken. Also, the satellites are way too spherical to just be passing asteroids or meterorites.
I just want to add some details on his personality, such as he absoluetely hates losing, and if he ever lost in a battle, it would seriously piss him off. I also have a theory as to why he was unaffected by the lightning, and that is because since he is already so powerful, the "heat", or power that is stored within him is much "hotter" or more powerful than that of a lightning bolt, and that is why it had no effect, even though that was shown in the intro, which shouldn't be taken seriously, since it's just an intro.