Fog at Titan’s south pole is evidence of the evaporation of liquid methane on the surface and its subsequent condensation into humid air (Image: NASA/JPL/Space Science Institute)
FOG has been spotted on Titan, the first evidence that the Earth isn’t the only body in the solar system to have a hydrological cycle. Yet Titan’s cycle is based on methane.
Saturn’s moon Titan is known to have lakes, clouds and river beds, hinting that surface liquid evaporates and returns as rain. But proof is lacking: the lakes might not evaporate, the clouds might not rain, and the river beds might be relics from a wetter past.…
