Final answer:
The Huygen's probe landed on Titan, Saturn's moon, which is the only satellite in the solar system with a dense atmosphere. The probe landed on January 14, 2005, as part of the Cassini-Huygens mission. The correct option is e.
Step-by-step explanation:
The only satellite in the solar system with a dense atmosphere where the Huygen's probe landed in January 2005 is Titan. This ambitious exploration was part of the NASA Cassini Saturn orbiter and the European Space Agency's Huygens mission.
Titan, belonging to Saturn, is unique among moons with its thick atmosphere composed primarily of nitrogen and a mix of other components like methane and hydrocarbons, and it features hydrocarbon lakes and a weather system that includes rain and possibly seasons.
During the Cassini-Huygens mission, the Huygens probe descended through Titan's atmosphere, documenting its descent and providing unprecedented insights into this intriguing celestial body.
The landing on January 14, 2005, was a remarkable achievement as it represented the first and so far only spacecraft landing on a moon in the outer solar system.
Titan's complex atmosphere and the presence of liquid hydrocarbons on its surface make it a subject of interest for the scientific community and the search for life beyond Earth.