Astronomy in the United States: Workforce Development and Public Engagement
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Organizations, People and Strategies in Astronomy I (OPSA I), 77-91 Ed. A. Heck, © 2012 Venngeist. ASTRONOMY IN THE UNITED STATES: WORKFORCE DEVELOPMENT AND PUBLIC ENGAGEMENT CHRIS IMPEY University of Arizona Steward Observatory 933 N. Cherry Avenue Tucson AZ 85721, U.S.A. [email protected] Abstract. Astronomy workforce development and public engagement in the United States are described. The number of professional astronomers has grown by about a third in the past 25 years, to about 4000. Only one in four are faculty in an academic setting; the rest work in a wide range of public and private research institutes. PhD production has remained steady at about 200 per year. Women account for roughly half of BSc degrees and a third of PhD degrees, but their participation declines to about 10% at the level of full professor. Minorities are underrepresented by a substantial fac- tor at all levels of the profession. In terms of public engagement, astronomy has unique advantages associated with its visual appeal and the large and active amateur astronomy community. The are 1400 public planetaria in the U.S., with another 110 in schools and universities. Astronomers have made good use of new media such as blogs and podcasts and social networks, but the biggest impact has been in the area of citizen science, where people with no technical background contribute directly to a research project by, for example, classifying galaxies. The International Year of Astronomy and the remarkable success of the Galileoscope have inspired large numbers of people to appreciate astronomy, contributing indirectly to the professional vitality of the field. 1. Introduction Astronomy has a singular status among all sciences in the awareness of the general public. Throughout its long history it has been twined with culture 78 CHRIS IMPEY through stories told about stars and planets, and it has been embedded in daily life through its importance for navigation and time-keeping. From the time of the Copernican Revolution, astronomy has shaped our sense of our place in a vast and ancient universe. In the modern age, astronomy is one of the most vital sciences, with discoveries spurred by sophisticated space observatories and large new ground-based telescopes. Part of its popularity is its instant visual appeal; images from the Hubble Space Telescope have attained iconic status around the world. Astronomy is simultaneously big and small sciencecutting edge facilities cost billions of dollars, but CCDs are cheap enough that a legion of amateur astronomers participates, and they can generate publishable research. The public feels ownership over the subject in a way that benefits the profession and its practitioners. This article will give an overview of the development of an astronomical workforce and the modes by which astronomers engage with the public. Space is too limited for details, which can be pursued through references at the end. The focus is the United States, but professional astronomy is a highly collaborative “village” of 10,000 people, with projects and meetings drawing from many countries. The same is true of public engagement. The ubiquity and reach of the Internet, and the rise of English as the dominant second language, mean that astronomy outreach can be truly international. The US community goes through an important process every ten years called the Decadal Survey (National Research Council 2010). Sponsored by the National Academy of Sciences, each decadal survey harnesses a broad swathe of the community in preparing a report that summarizes the state of the profession and sets funding priorities for the succeeding ten years. This type of high-stakes consensual exercise is rare in any scientific field. 2. Workforce Development The world does not have, and probably does not need, a large number of astronomers. The economic benefits of astronomy are largely indirect and the “currency” of the field is primarily intellectual. In challenging economic times, it can be difficult to defend investment in work that is motivated by expanding the understanding of the universe we live in. Yet it is a pursuit that exemplifies our capacity for abstract thought and separates us from all other species on the planet. At its best, astronomy is both inspirational and humbling. 2.1. DEMOGRAPHICS OF ASTRONOMERS The best gauge of the number of professional astronomers in the US is the count of full members of the American Astronomical Society. This has risen from just under 3000 in 1984 to 4000 in 2009 (Fig. 1). There are © 2012 Venngeist ASTRONOMY IN THE UNITED STATES 79 Figure 1. Membership of the American Astronomical Society from 1984 to 2009, in- cluding members inside and outside the United States. Growth was 33% during a period when the US population increased by 25%. (Courtesy Kevin Marvel and the AAS) also 1000 junior members, typically astronomy students, and 2500 “other” members, consisting of an assortment of teachers, professionals in related fields, and amateur astronomers (American Astronomical Society 2005). This total probably grows to 9000 if others who do not necessarily self- identify as astronomers, such as relativists, cosmologists and astro-particle physicists, are included. Globally, the International Astronomical Union has a membership of 10,000, roughly a quarter of who are from the US. Most astronomers work in academic settings and their jobs involve a mix of teaching and research (Fig. 2). Then come research institutes associated with universities and observatories (e.g. CARMA, Carnegie, CSO, LBT, Kavli, Keck, SAO). About one in six astronomers either works for the gov- ernment (NSF, NASA, NRL, USNO) or in federally-funded research and development centers operated by NASA (e.g. Ames, Goddard, Kennedy, JPL, Marshall) or the NSF (Gemini, NAIC, NSO, NOAO, NRAO, NSO). The non-profit category includes old and illustrious planetaria (Adler, Grif- fith, Hayden), and there is a smattering of astronomers in industry and the military. Among the large cohort of academic astronomers, many are on soft money or have adjunct faculty status so have little job security. Aca- demic astronomy suffers from the constrained resources that hamper public universities all over the US. © 2012 Venngeist 80 CHRIS IMPEY Figure 2. Employment in astronomy and closely related fields, from a random sam- ple of 705 member of the American Institute of Physics and affiliated societies. UARI’s are University-affiliated research institutes like NASA centers and National Observato- ries. FFR&DCs are Federally-funded research and development centers like JPL and Los Alamos Laboratory. (Courtesy Rachel Ivie and the AIP Statistical Research Center) 2.2. THE TRAINING OF ASTRONOMERS Astronomy is a relatively small academic field. Between 1997 and 2006 the number of astronomy BSc degrees doubled from 170 while PhD degrees were steady at about 200 per year (Fig. 3). By way of comparison, the 350 BSc and 200 PhD degrees in astronomy awarded in 2006 is far less than the 16,000 BSc degrees and 3700 PhD degrees in other physical sciences or the 90,000 BSc degrees and 7700 PhD degrees in life and agricultural sciences (National Science Foundation 2011). Astronomy has close ties to physics so these numbers are underestimates, since students can pursue physics degrees with a specialization in astronomy. About 3/4 of these graduates are US citizens or permanent residents and 90% stay in the US after graduation (Ivie 2010). The next part of the standard career path has benefited from government investment in major research facilities over the past twenty years. After the PhD, most astronomers look for a postdoctoral fellowship or a fixed-term © 2012 Venngeist ASTRONOMY IN THE UNITED STATES 81 Figure 3. Astronomy degrees earned in the United States from 1997 to 2006. Masters degrees include those earned en route to a PhD The rise in Bachelors degrees was caused by physics departments adding the option of a double major. (Sources are the NSF for the PhD, the National Center for Education Statistics for the MSc, and the AIP for the BSc) research position. Using the metric of positions advertised in the AAS Job Register, the number of such positions has doubled in the past ten years 2 and /3 of all PhD recipients take such a position (Fig. 4). Eight years after PhD, 85% of astronomers have long-term or permanent jobs, half in research and half in administration or teaching. In the US there are 1700 faculty positions, with 35% in astronomy departments and 65% in physics departments. Assuming no growth in that sector and replacement after 35 years, that implies there will only be academic employment in the future for 1/4 of astronomy PhD recipients (Ivie 2010). On the other hand, the unemployment rate for people with degrees in astronomy and astrophysics is very low, about 1% (American Astronomical Society 2005). 2.3. DIVERSITY AND DIVERSIFICATION Astronomers are still mostly male, white, and relatively old, although there are trends making the profession more diverse. There has been slow and steady success in attracting women into astronomy, with a rise from 10% to 30% in the percentage of women receiving BSc degrees from 1966 to 2001 and a rise from 5% to 22% of women receiving PhD degrees over the same period (Fig. 5). Gender parity is much better than in physics but markedly worse than in biology. The American Institute of Physics workforce surveys show the diminishing fraction of women through the ranks of astronomy, from 45% with MSc degrees and 28% with PhD degrees © 2012 Venngeist 82 CHRIS IMPEY Figure 4. Data from the American Astronomical Society Job Register, showing the number of postdoctoral (red), faculty (green/yellow), and research (blue/cyan) positions advertised from 1992 to 2008. After 2002 the shaded regions of the histograms show the portion of the jobs that were in the US Faculty positions are divided into tenure track (green) and non-tenure track (yellow) and research positions are divided into research (blue) and support (cyan).