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: unique characteristics of Titan and Triton
Useful Output:

Doc 1: Neptune's largest moon Triton (don't get its name confused with Titan) has a diameter of 2720 kilometers and a density of 2.1 g/cm3, indicating that it's
Doc 2: Everything you could want to know about Neptune's largest moon, Triton. NASA Voyager 2 images of Triton explained.
Doc 3: In fact, the truth is that Titan is the only moon with a dense atmosphere. Neptune's largest moon, Triton, also has an appreciable atmosphere. Triton is smaller
Doc 4:  Triton's Dwarf Planet Status: Uncover the history of Neptune's moon Triton and its possible past as a dwarf planet. Examine the characteristics
Doc 5: Unlike most other moons in our solar system, Titan has a very thick atmosphere that hides its surface from view. Chemicals in the atmosphere give Titan its