An exoplanet is a planet that orbits a star outside of our solar system. These planets are found in other star systems and are not part of the Sun's family of planets. Exoplanets can vary in size, composition, and distance from their host star, and their discovery has expanded our understanding of the diversity of planetary systems in the universe. Scientists use a variety of methods, such as the transit method and the radial velocity method, to detect and study exoplanets. **

While it is fun to imagine an exoplanet made of chocolate, it is highly unlikely to exist in reality. Exoplanets are typically composed of rock, gas, or ice, and the conditions required for the formation of a chocolate planet are not found in the universe. Chocolate is a product of organic matter and requires specific conditions such as the presence of cocoa trees, sugar, and other ingredients that are not found in the vast majority of exoplanets. Therefore, while it is a fun idea, a chocolate exoplanet is not scientifically feasible. **

As of now, images of Proxima Centauri b have not been taken directly. Due to the vast distance between Earth and the exoplanet, it is extremely challenging to capture images of it using current technology. Most of the information we have about Proxima Centauri b comes from indirect methods such as studying its parent star's light or analyzing data from telescopes. **

The nearest exoplanet outside of the solar system is Proxima Centauri b, which orbits the red dwarf star Proxima Centauri, the closest star to the Sun. Proxima Centauri b is located approximately 4.24 light-years away from Earth and is considered to be within the habitable zone of its star, making it a prime candidate for the search for extraterrestrial life. This exoplanet was discovered in 2016 and has since been the subject of extensive study and observation. **

It is difficult to predict when we will find the first exoplanet with intelligent life, as it depends on various factors such as the advancement of technology, the discovery of suitable exoplanets, and the ability to detect signs of intelligent life. While the search for extraterrestrial intelligence is ongoing, it is uncertain when we will make such a groundbreaking discovery. However, with the continuous advancements in space exploration and technology, it is possible that we may find evidence of intelligent life on an exoplanet in the coming decades. **

Laptops and smartphones serve different purposes and have their own unique advantages. Laptops are more useful for tasks that require a larger screen, a physical keyboard, and more processing power, such as writing long documents, editing photos or videos, and multitasking. On the other hand, smartphones are more convenient for on-the-go communication, quick internet browsing, and accessing apps on the fly. Ultimately, the usefulness of each device depends on the specific needs and preferences of the user. **

No, the radius of exoplanet Kepler 90h is not provided in Material 4. The material only mentions that the exoplanet is located in the Kepler-90 system and is one of eight planets orbiting the star Kepler-90. The specific radius of Kepler 90h is not given in the provided information. **

Smartphones are handheld devices that combine the functionality of a mobile phone with features such as internet connectivity, touchscreen interfaces, and various applications. Mobile phone accessories are additional items that can enhance the functionality or aesthetics of a smartphone, such as cases, screen protectors, chargers, headphones, and portable power banks. These accessories can help users personalize their devices, protect them from damage, and improve their overall user experience. **