methane and ethane), and deltas, and is dominated by seasonal weather patterns as on Earth. With its liquids (both surface and subsurface) and robust nitrogen atmosphere, Titan's methane cycle nearly resembles Earth's water cycle, albeit at a much lower temperature of about 94 K 0 . Due to these factors, Titan is sometimes called the most Earth-like celestial object in the Solar System.

Discovery and naming

The Dutch astronomer Christiaan Huygens discovered

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