Titan

Titan is Saturn’s largest moon and the only moon known to have a dense, nitrogen-rich atmosphere. Its surface has rivers and lakes of liquid methane and ethane.

Methane cycle on Titan: The circulation of methane through Titan’s atmosphere, clouds, rainfall, rivers, lakes, and subsurface reservoirs. It links Titan’s clouds and storms to the hydrocarbon rivers and lakes at its surface.
Huygens probe: The European Space Agency lander that descended through Titan’s atmosphere and reached its surface in 2005. It returned the first direct measurements and images from Titan’s ground.
Saturn: The sixth planet from the Sun and the largest planet in the Solar System after Jupiter. Titan is Saturn’s largest natural satellite and orbits within its magnetosphere.
Earth: The third planet from the Sun and the only world known to support life. Earth’s water cycle offers a familiar comparison for Titan’s methane cycle.
Titan's atmosphere: A dense atmosphere composed mostly of nitrogen, with methane and other trace gases. Its nitrogen-rich air drives weather and shields the surface from much solar radiation.
Cassini–Huygens: A NASA–ESA–ASI mission that studied Saturn and its moons from 2004 to 2017. Its observations established most current knowledge of Titan’s global surface and atmosphere.
Natural satellite: A celestial body that orbits a planet or another body larger than itself. Titan is a natural satellite whose size and atmosphere make it exceptional.
Triton: Neptune’s largest moon, a cold world with a thin nitrogen atmosphere and active surface geology. Its nitrogen atmosphere and icy landscape contrast with Titan’s dense air and hydrocarbon lakes.
Titanian lakes: Surface bodies of liquid methane and ethane found in Titan’s polar regions. They store hydrocarbons delivered by precipitation and river networks.
Kraken Mare: The largest known hydrocarbon sea on Titan, located near its north pole. Its size and branching bays make it a defining example of Titan’s seas.

Linked from 19 pages