The idea of citizen science (CS) has been around for a very long time, and arguably goes back to the "gentleman science" time of Galileo and his contemporaries. The advent of the Internet has tremendously expanded the opportunity for the public to engage in scientific research using the CS model. A simple search on GOOGLE, for example, turns up projects as simple as merely noting the faintest stars that you can see in a constellation (GLOBE at Night) or as complex as The Milky Way Project, which has participants view thousands of infrared images of the Milky Way from the Spitzer Space Observatory and identify interstellar bubbles. Among the many concerns that scientists raise to the CS approach for conducting scientific research is whether the results will actually be meaningful to the scientific community at large. This consideration relates to questions about whether novice, non-professional participants are capable of delivering high-quality data to the Principle Investigator or project team (Lewandowski 2015; Kosmala et al. 2016). Labor and software development costs also have to be controlled that are associated with setting up and operating a CS project (Sauermann and Franzoni 2014). The bottom-line concern for most scientists, however, is whether the CS effort will lead to publishable results that will advance scientific knowledge in some measurable way. This paper describes the application of citation metrics to research papers published specifically within the CS project areas of space science and astronomy. It also attempts to place the products of CS-leveraged research within the context of general space science research. The objective is to use traditional citation analysis to determine whether CS research is quantitatively different from traditional space science research in its depth of penetration into the general research dialog. Methods One of the earliest citation studies-of all scientific papers, not just those focused on citizen science-was by de Solla Price (1965), who investigated "networks of scientific papers" by linking each published paper to other papers that later reference them. In 1979, Abt (1981) embarked on a study of 326 astronomy-related research papers published in 1961 and cited from 1961 to 1979. Using data from the Science Citation Index (1962), the study found 6,070 citations to these papers, and established that a typical research paper published at that time enjoyed approximately one citation per year, e.g., 6070/(326 * 18). Only about one-in-eighteen papers generated more than three citations per year irrespective of whether they were primarily observational or theoretical in nature. The peak