5. Nova
Richard Rider, or Nova, is the leader of an intergalactic police force. Given his powers as a teenager, Nova has learned to hone them over time. His powers were given to him by a dying Xandarian Rhomann Dey, the former leader of the Nova Corps of Xander. Nova's powers consist of a vast energy source that grant him superhuman strength, the ability to fly, incredible durability and maybe the most impressive of them all is his ability to absorb energy and use it as his own power while shooting out power beams and energy pulses. Also, the uniform that he wears is incredibly durable and has weapons built into it itself. The self proclaimed defender of the Galaxy is a force to be reckoned with. His weakness? His main weakness is his predictability. As an officer of the law, he does have restrictions in what he can do and his enemies know it. Other than that, he's fast but not incredibly fast. Nova is one of the mot underestimated and under-appreciated superheroes of all time.