Planetary exploration involves the investigation of celestial bodies within our solar system, such as Mars, Venus, and the Moon. This exploration is conducted through various means, including robotic spacecraft and landers, which gather data about the composition, atmosphere, and potential for life on these planets. The information obtained from planetary exploration helps scientists understand the formation and evolution of our solar system. Missions like NASA's Perseverance Rover and ESA's Mars Express have provided invaluable insights, paving the way for future human exploration and the search for extraterrestrial life.