NASA’s citizen science projects are collaborations between scientists and interested members of the public. Through these collaborations, volunteers (known as citizen scientists) have helped make thousands of important scientific discoveries. More than 410 NASA citizen scientists have been named as co-authors on refereed scientific publications. Want to work on some real NASA science? Click on one of the 29 projects below to get started. NASA citizen science projects are open to everyone around the world, not limited to U.S. citizens or residents. Projects with the icon can be done by anyone, anywhere, with just a cellphone or laptop.