We defined a moonshot as a complex, large-scale objective that can be accomplished only when teams abandon "business as usual." Moonshots require significant breakthroughs in attitude, innovation, leadership, processes, management, and technology. They demand extraordinary execution and are often marked by seemingly unrealistic time lines. […] My first real moonshot was in the 1990s with the creation of the PalmPilot—the precursor to the smartphone. Lisa's most memorable moonshot was Nokia's MOSH, the first big mobile social sharing platform, which swelled to 13 million users in its debut year.
Source: wiktionary