Question

（please type not handwrite）astronomy

5. Carefully describe Saturn’s moon Titan. The length of your description should be 1/2 page

Answer 1

Titan was discovered on March 25, 1655 by the Dutch astronomer Christiaan Huygens

It was the sixth moon to be discovered, after Earth's Moon and the Galilean moons of Jupiter.Titan is 50% larger than Earth's Moon, and it is 80% more massive.Titan orbits Saturn at 20 Saturn radii. Titan orbits Saturn once every 15 days and 22 hours. From Titan's surface, Saturn subtends an arc of 5.09 degrees and would appear 11.4 times larger in the sky than the Moon from Earth.

Titan is primarily composed of water ice and rocky material. Much as with Venus before the Space Age, the dense opaque atmosphere prevented understanding of Titan's surface until new information from the Cassini–Huygens mission in 2004, including the discovery of liquid hydrocarbon lakes in Titan's polar regions. The geologically young surface is generally smooth, with few impact craters, although mountains and several possible cryovolcanoes have been found.

The atmosphere of Titan is largely nitrogen; minor components lead to the formation of methane and ethane clouds and nitrogen-rich organic smog. The climate—including wind and rain—creates surface features similar to those of Earth, such as dunes, rivers, lakes, seas (probably of liquid 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 is analogous to Earth's water cycle, at the much lower temperature of about 94 K .