Interesting fact about CubeSat satellites
Beginning in 1999, California Polytechnic State University at San Luis Obispo (Cal Poly) and Stanford University developed a very small spacecraft concept to help universities worldwide to enable students and researchers perform space science and exploration. The aim was to come up with a concept that would not only allow university groups to rapidly implement a small space mission, but also to ensure that the chances of being embarked on a space launch as a secondary passenger were maximized, by standardizing interfaces and prohibit or limit design aspects that could be potentially hazardous and would reduce the chances of being allowed to be launch next to larger, more expensive spacecraft.
The CubeSat reference design was proposed in 1999 by professors Jordi Puig-Suari of California Polytechnic State University and Bob Twiggs of Stanford University. The CubeSat as initially proposed did not set out to become a standard; rather, it became a standard over time by a process of emergence, and culminated in a very popular and standardized satellite concept. The first CubeSats were launched in June 2003 on a Rockot launch vehicle.