Developing, testing, launching and operating a space science mission typically costs hundreds of millions to billions of dollars, but a new breed of satellites lowers the price tag to just $100,000 or so.

These cubic, one-liter, one-kilogram satellites, called CubeSats, are designed to be launched in batches and can piggyback on other space missions, thus dramatically reducing launch costs. CubeSats originated in a set of technical specifications proposed as a standard in 2000 by aerospace engineer Bob Twiggs, formerly of Stanford University's Space and Systems Development Laboratory, and Jordi Puig-Suari of California Polytechnic State University, San Luis Obispo.

The two engineers wanted to make space science affordable for most science laboratories and even for college and high school projects. CubeSats have been embraced as an educational tool, because a team of students can design and build one in just two years, and students can get a holistic feeling of what space science is about.

The concept has spread—even NASA and the National Science Foundation have joined the club—and dozens of teams have started CubeSat projects. At least two dozen have already completed their missions successfully.

Members of the CubeSat community build on each other's experience, sharing design tips. As Twiggs and Alex Soojung-Kim Pang wrote in "Citizen Satellites," their February 2011 Scientific American article, "When developers find something that works—one model of ham radio that works in space longer than another, for example—they share their findings with other CubeSat designers."

Meanwhile, several companies have started selling off-the-shelf CubeSat components, such as flight electronics, transceivers, solar panels and structural elements. Teams of scientists and engineers can now focus on designing science instruments that are particular to their own CubeSats, rather than having to design entire spacecraft from scratch.

Learn more about CubeSats in this slide show