What makes Superman superman?

what makes him Sueprman is his choices in life and the love he gives to his parents and friends. he never holds a grudge or endangers inncocent lives...not even villains. He has the strength to destroy the planet but uses it instead to put his life on the line for others he doesn't even know. He is something this world is missing...Truth, justice and the american way...he stands for something the world needs and people look up to him as inspiration that one day someone like him can help others in need. He never asks anything in return from anyone and doesn't even lie about who is he or what he can do ...he only hides it to protect his family and friends. Superman has amazing powers to give him flight, strength and invulnerability but when someone hurts his family and friends he is not invulnerable. that's one thing that hurts him worse than death itself. He may be super and a man but his name doesn't make him Superman it's what he does and what he stands for that does.

This has never been satisfactorily explained. The general explanation is that the gravity of Krypton was so much greater than that of Earth (Krypton must have almost been a neutron star) that the people there had developed an ability to counteract the gravity. They weight hundreds of thousands of tons on Krypton (coincidentally, the same amount that Superman can lift on Earth.) On Earth, he not only is much stronger than anybody else, because his muscles are evolved for Krypton’s gravity, he is also absorbing solar energy so much more than was available on Krypton that he is able to offset or counteract Earth’s gravity to the point where he can actually defy it. So, it seems that Superman’s flight is reactionless (he isn’t shooting out a jet exhaust anywhere) and probably psionic. Note that I did not say a mutant ability! Just psionic. It is my speculation that if he knew how he did it, he might be able to teach others. 18 MAR 07, 2302 hrs, GMT.

the Earth's sun is what gives Superman his powers

You hit the nail on the head Merrill D. Well said!

he's super(can fly ,have super powers like eye laser, can kick butt)and a man

SUPER+ MAN=SUPERMAN

He came from a planet that has stronger gravity than the Earth.

He's an alien raised on Earth by humans.

because he's super...thanks for asking....(must sing this answer as Big gay Al would in order to get the full effect)

he's a champion of justice its not the powers and the way the kents raised him

He's Super in every category there is.