An Asgardian god cast down to Midgard in order to learn a lesson in humility, Thor more than made up for his hubris by becoming a hero to Earth and a founder member of the avengers.
Prince of Asgard
For Thor, pride came before a fall from grace and earned him temporary banishment from Asgard, home to the Norse Gods. Stripped of his godhood an made to walk among mankind not only as a human but as a disabled one - Dr. Donald Blake - the God of Thunder learned his lesson. He grew to love and respect the mortals who had once worshipped his kind.
As Dr. Donald Blake, Thor fellin love with nurse Jane Foster. Jane briefly became an Asgardian, but could cope with her powers and was sent back to Eath minus her memories of Thor.
Thor possesses the strength and endurance of a god, and has a greatly extended life span. He is immortal as long as he eats a Golden Apple of Iduun from time to time. His body is many times denser than that of a human. He is highly resistnat to injury and immune to most diseases. Thor can fly at supersonic speeds within Earth's atmosphere and faster than the speed of light when in space. His beserker rages increase his strength as he gets more and more angry.
HIS WEAPON: MJOLNIR
Forged from nigh-unbreakable uru metal, the enchanted hammer Mjolnir allows its wielder to call down wind, rain, thunder, and lightling. Thor can summon Mjolnir mentally and channel his powers through it to strike devastating blows or blasts of energy. By spinning Mjolnir at incredible speeds, he can also open portals to other dimensions.
Mijonir's Inscription: "Whosoever holds this hammer, if he be worthy, shall posses the power of Thor."
Source: Marvel The Avengers Super Hero Guide