NASA's Science Mission Directorate has selected nineteen new citizen science proposals in 2026, spanning astrophysics, heliophysics, and planetary science. Twelve come from the Citizen Science Seed Funding Program (CSSFP-25), designed to expand the pool of professional scientists using volunteer labor. Seven come from the Science Activation Program (SciAct), which connects underserved communities to NASA data and authentic research experiences. The selections arrive alongside notable milestones: Backyard Worlds volunteers have now discovered most known brown dwarfs, and the Zooniverse platform has crossed one billion classifications. The astrophysics proposals are the headline acts. The Rogue Worlds Project, led by Jacqueline Faherty at the American Museum of Natural History, will task volunteers with searching SPHEREx near-infrared sky survey data for free-floating planets and brown dwarfs in young star clusters. Planet Hunters Roman, led by Bernard Gaudi at Ohio State, will extend citizen science to planetary microlensing — spotting exoplanets in Nancy Grace Roman Space Telescope data by the way their gravity bends starlight. Overlap Zoo, led by Benne Holwerda at the University of Louisville, is already live and recruiting volunteers to characterize rare overlapping galaxy pairs to quantify galactic dust content. Heliophysics dominates the proposal count with six selections. The most tangible is Space Weather UnderGround, led by Hyunju Connor at Goddard, which will deploy a low-cost magnetometer array with citizen volunteers in Alaska to monitor magnetospheric disturbances from the solar wind. Lauren Blum's sonification project at CU Boulder will convert magnetospheric plasma wave data into audio for human pattern recognition. Four other heliophysics proposals — covering foreshock transients (Johns Hopkins), particle precipitation matching (UCLA), solar energetic particle distributions (Catholic University), and solar wind tracers (University of Maryland, Baltimore County) — all follow a common template: give volunteers structured classification tasks on existing mission data from MMS, Parker Solar Probe, Solar Orbiter, and the Advanced Composition Explorer. Planetary science gets two slots. Karen Martirosyan at UT Rio Grande Valley will recruit volunteers to map lunar iron abundance using Moon Mineralogy Mapper data — directly relevant to in-situ resource utilization for future lunar base construction. Ariel Graykowski at SETI Institute proposes a global network of citizen-operated small-aperture telescopes for comet outburst monitoring and small body follow-up, complementing professional surveys with twilight observations and global distribution. The SciAct selections add educational scaffolding. Growing Beyond Earth, led by Carl Lewis at Fairchild Tropical Botanic Garden, equips middle and high school classrooms to conduct space crop growth experiments. Sungrazer 2.0, led by MaryKay Severino with science lead Karl Battams at the Naval Research Laboratory, updates the original 2006 Sungrazer Project whose volunteers have identified 5,204 comets — the majority of known comets — and will expand the volunteer base for comet discovery in solar observatory imagery. The structural story here is the scaling economics of citizen science. NASA gets classification labor, pattern recognition, and even distributed physical infrastructure (magnetometers, telescopes) at a fraction of what professional staffing would cost. Volunteers get access to real mission data and genuine scientific contribution. The integration of what NASA calls "super intelligence" techniques to amplify volunteer work — building data tools and helping write papers — signals a shift from pure human classification toward hybrid human-AI pipelines. The Zooniverse billion-classification milestone is the proof point: this is not a token outreach exercise but a production-scale research method. The risk profile is modest but real. Citizen science projects depend on sustained volunteer engagement, which historically decays. Data quality control requires professional oversight that scales with volunteer count. And the funding mechanism — seed grants and activation programs — means these projects must prove viability quickly or die. But the model's track record is strong: Backyard Worlds discovering most known brown dwarfs and Sungrazer identifying the majority of known comets are not participation trophies. They are load-bearing scientific contributions that professional surveys alone did not achieve.
