TrES-2b is slightly larger than Jupiter, categorizing it as a gas giant. Its significant size, along with its extreme properties, makes it a fascinating target for research. 

Located about 750 light-years away in the constellation Draco, TrES-2b is part of a planetary system that continues to intrigue astronomers. 

One of the most striking features of TrES-2b is its extraordinarily low reflectivity, absorbing nearly all the light that hits it. This makes it one of the darkest known exoplanets. The atmosphere is believed to be thick, containing clouds rich in sodium and potassium, contributing to its unique appearance. 

The exact internal structure of TrES-2b is not well understood due to limited observational data. However, like many gas giants, it is expected to have a layered structure consisting of a dense core, likely made of heavier elements (such as rock and metal), surrounded by thick layers of gas primarily composed of hydrogen and helium. The high atmospheric absorption of light suggests that its outer layers may contain clouds with complex chemical compositions, but specific details about its core and deeper layers remain largely speculative. 

Its extreme darkness and atmospheric composition offer valuable insights into the study of light absorption and atmospheric dynamics. Understanding TrES-2b can provide clues about the evolution of planetary atmospheres and the potential for similar planets in other systems.