Orbital insertion is the process of placing a spacecraft into a stable orbit around a celestial body, such as a planet or moon. This is achieved by performing a maneuver that adjusts the spacecraft's speed and trajectory, allowing it to be captured by the body's gravitational pull. Once the spacecraft reaches the desired altitude and velocity, it can maintain its orbit with minimal fuel consumption. Successful orbital insertion is crucial for missions involving satellites, space telescopes, and exploratory probes like Mars Rover or Hubble Space Telescope, enabling them to conduct scientific observations and gather data.