This moon circling distant alien gas giant is very similar to our Saturn's Titan. It's surface is covered with various ices (mainly water ice) and methane/ethane lakes and seas. The main difference is that it's sky is not shrouded by thick layer of orange clouds.  And since it's atmosphere's main component is methane the sky has unusual greenish tone...

Sense of Wonder times ten!  This is a majestic piece, which stands completely on its own, but calls back to the very best in the tradition of realistic speculation in astronomical art.  A supremely well done piece of art!