The Delta Rocket is a family of expendable launch vehicles developed by NASA and later operated by United Launch Alliance (ULA). It has been used to launch satellites, cargo, and scientific missions into space since its first flight in 1960. The Delta rockets are known for their reliability and versatility, making them a popular choice for various space missions. The Delta family includes several versions, such as the Delta II, Delta III, and Delta IV. Each version has improvements in payload capacity and technology. The Delta rockets have successfully launched numerous important payloads, including GPS satellites and interplanetary missions, contributing significantly to space exploration and satellite deployment.