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The Sentry's powers derive from a serum that moves his molecules an instant ahead of the current timeline, although he also absorbs solar radiation for strength. Even though most of his powers and their limits are unknown, he displays several abilities including vast superhuman strength, superhumanly acute senses, superspeed, durability and the power of flight. The professor in Sentry Reborn states that his powers are virtually limitless and the sentry has been called a living god.
The Sentry has been shown to be able to easily lift tremendous weights, but was unable to stop the S.H.I.E.L.D. carrier from crashing without the help of Wonder Man and Miss Marvel. His speed is great enough to catch bullets, and through flight he can travel to the sun and back in a matter of minutes. Nick Fury has stated that S.H.I.E.L.D. has not yet found a way to kill the Sentry, and Iron Man's scanners have found no physical weaknesses in his body. His strength and invulnerability have officially been listed at the same level as Thor, and Hercules.[2]
The Sentry also has superhuman senses as he once told an opponent that he can see his nerve centers and claimed to be able to "hear a butterfly's heartbeat in Africa" from New York City. He can project energy fields and control light, and he uses his mental powers in his daily life, although they are primarily used for holding his physical form together. He was once able to implant his memories inside another person's mind. He can also emit a radiation that pacifies the Hulk, severely limiting the latter's rage-fueled power. His main weakness may be that he's been shown as susceptible to mental manipulation.
During World War Hulk' Spider-Man and a S.H.I.E.L.D. agent separately state that they consider the Sentry as the most powerful superhero on the planet, with the Hulk as second, and Black Bolt as third. In the comic Sentry: Reborn Reynolds told one of his opponents that he has never shown the full measure of his power. He has also boasted, in New Avengers #24 and again in Civil War - The Return, that he has the "power of a million exploding suns". The serum he drank was stated as being a hundred thousand times stronger than the original used on Captain America, and was modified by Weapon X.