I like the composition of today's Worlds Of Wonder here on JSVB, and it's a science-fiction staple: a habitable moon dwarfed by a gas giant mother planet. Life on a jovian moon is certainly possible. Although Jupiter in our own solar system is too far away from the Sun to support life directly, it's likely that the massive gravitational pull of Jupiter could cause tectonic disturbances deep within its frozen moon of Europa, releasing geothermal heat and gases enough to support life in liquid beneath the lunar ice.
Whether or not Europa could develop a life form sophisticated enough for Captain Kirk to seduce, that's a matter for future generations of space explorers to prove.