Final answer:
Europa, Jupiter's moon, is considered the most likely place in our solar system to support life due to its subsurface ocean. NASA's planned Europa Clipper mission aims to explore its potentially habitable conditions.
Step-by-step explanation:
The moon in our solar system most likely able to support life and may be a key science mission in the future is Europa. Research has indicated that beneath Europa's icy surface, there could be vast oceans of liquid water that could support biology. NASA is developing the Europa Clipper mission to thoroughly characterize Europa's subsurface ocean and icy crust, looking for signs of life. This mission will include flybys to investigate locations where material from the interior has been exposed on the surface, potentially offering direct evidence of microbial life. Additionally, the unique conditions of Europa's ocean, where it may directly contact underlying rocks, create an environment that some scientists believe is the most likely location for life beyond Earth within our solar system.