The planet in our solar system known for having a great amount of methane is Neptune. Neptune, the eighth planet from the Sun, is a gas giant characterized by its deep blue color, which is primarily due to the presence of methane in its atmosphere. The methane absorbs red light and reflects blue light, contributing to its striking appearance. Neptune's atmosphere contains other gases as well, including hydrogen, helium, and traces of ammonia. The planet's strong winds and storm systems are also notable, making it one of the most dynamic atmospheres in the solar system.