The K2 mission, utilizing the *Kepler* spacecraft, aims to expand upon the groundbreaking discoveries in exoplanets and astrophysics made by *Kepler*. K2 will observe target fields along the ecliptic for 2-3 years, offering long-term, simultaneous optical observations of thousands of objects with unprecedented precision. Early science commissioning has shown a photometric precision of 400 ppm in a single 30-minute observation and 80 ppm over 6 hours. K2 will conduct a unique exoplanet survey, filling the gaps between *Kepler* and TESS missions, and provide pre-launch exoplanet target identification for JWST transit spectroscopy. Additionally, K2 will study young open clusters, bright stars, galaxies, supernovae, and asteroseismology. The mission's key science goals include detecting exoplanets around low-mass and bright stars, surveying open clusters, studying star-forming regions, and observing variable extragalactic sources. Early science results demonstrate K2's ability to achieve these goals, with a photometric precision comparable to *Kepler* and the potential to discover high-value transiting exoplanets.The K2 mission, utilizing the *Kepler* spacecraft, aims to expand upon the groundbreaking discoveries in exoplanets and astrophysics made by *Kepler*. K2 will observe target fields along the ecliptic for 2-3 years, offering long-term, simultaneous optical observations of thousands of objects with unprecedented precision. Early science commissioning has shown a photometric precision of 400 ppm in a single 30-minute observation and 80 ppm over 6 hours. K2 will conduct a unique exoplanet survey, filling the gaps between *Kepler* and TESS missions, and provide pre-launch exoplanet target identification for JWST transit spectroscopy. Additionally, K2 will study young open clusters, bright stars, galaxies, supernovae, and asteroseismology. The mission's key science goals include detecting exoplanets around low-mass and bright stars, surveying open clusters, studying star-forming regions, and observing variable extragalactic sources. Early science results demonstrate K2's ability to achieve these goals, with a photometric precision comparable to *Kepler* and the potential to discover high-value transiting exoplanets.