You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "how are saturn's moon titan and neptune's triton similar?" whose answer is geologically active.
Each document should contain about 30 words, and these documents should contain useful information.

Query: characteristics of Saturn's moon Titan and Neptune's moon Triton
Useful Output:

Doc 1: Everything you could want to know about Neptune's largest moon, Triton. NASA Voyager 2 images of Triton explained.
Doc 2: Triton is unique among the large moons of the solar system in that it moves in a retrograde orbit—i.e., one that is opposite the direction of
Doc 3: Titan is Saturn's largest moon. Titan is unique in that it is the only moon with a thick atmosphere. In fact, Titan's atmosphere is thicker and denser than
Doc 4: Triton has a diameter of 1,680 miles (2,700 kilometers). Spacecraft images show the moon has a sparsely cratered surface with smooth volcanic
Doc 5: Neptune's moon Triton also has unusual characteristics and resembles Pluto  Saturn's moon Titan has an atmosphere that is thicker than that of Earth.