Stardust@home

Stardust@home
Name	Stardust@home
Mission	Volunteer-based micrometeoroid search
Operators	NASA, University of California, Berkeley, Jet Propulsion Laboratory
Launch year	2004
Status	Completed (primary phase)

Stardust@home is a distributed volunteer computing and image-analysis project that recruited members of the public to search for interstellar and cometary dust tracks in aerogel collectors returned by the Stardust mission. The project connected amateur volunteers with professional teams from institutions such as NASA Ames Research Center, Lawrence Berkeley National Laboratory, University of California, Santa Cruz, and Jet Propulsion Laboratory, enabling large-scale visual inspection of microscopy data during the early 2000s and 2010s. It exemplified collaboration among participants associated with organizations like SETI Institute, Smithsonian Institution, American Association for the Advancement of Science, and Planetary Society.

Overview

Stardust@home invited citizen scientists, hobbyists, and students to examine high-resolution images of aerogel captured by microscopes at facilities including Microscopy Society of America, Lawrence Berkeley National Laboratory, Sandia National Laboratories, Stanford University, and University of California, Berkeley. The project integrated tools and infrastructure from partners such as NASA, Microsoft Research, Sun Microsystems, Lawrence Livermore National Laboratory, and National Aeronautics and Space Administration laboratories. Volunteers interacted through online platforms maintained by organizations like Zooniverse, Citizen Science Alliance, Smithsonian Institution, Space Science Institute, and American Astronomical Society. The initiative linked professional research teams from Cornell University, Harvard University, Caltech, Massachusetts Institute of Technology, and University of Arizona with a broad public audience.

History and development

Origins trace to the Stardust mission, a project managed by NASA and led by investigators from Jet Propulsion Laboratory and University of Arizona. After the mission's sample return capsule landed at Utah Test and Training Range in 2006, teams from NASA Ames Research Center, Lawrence Berkeley National Laboratory, University of California, Berkeley, California Institute of Technology, and Smithsonian Institution required large-scale examination of collectors. Project founders from institutions including SETI Institute, Planetary Society, University of California, Santa Cruz, and Brown University designed a public interface influenced by precedents like Folding@home, SETI@home, Galaxy Zoo, and projects at Citizen Science Alliance. Funding and support came from agencies and foundations such as NASA Science Mission Directorate, National Science Foundation, Gordon and Betty Moore Foundation, and Simons Foundation. Over successive phases, collaborators from National Optical Astronomy Observatory, American Museum of Natural History, Natural History Museum, London, and European Space Agency contributed expertise and comparative samples.

Methodology and volunteer contributions

The workflow combined microscopy imaging from facilities like Lawrence Berkeley National Laboratory and Stanford University with web-based classification interfaces modeled on platforms used by Galaxy Zoo and Zooniverse. Volunteers trained via tutorials developed by researchers from University of California, Berkeley, Harvard-Smithsonian Center for Astrophysics, California Institute of Technology, Jet Propulsion Laboratory, and Cornell University. Each aerogel tile image was examined multiple times by participants recruited through partnerships with National Science Teachers Association, American Association for the Advancement of Science, BBC, NASA, and Scientific American. Quality control used consensus algorithms informed by techniques from teams at Massachusetts Institute of Technology, Microsoft Research, Stanford University, Lawrence Livermore National Laboratory, and Los Alamos National Laboratory. Volunteer contributions were logged alongside metadata standards influenced by International Astronomical Union, WorldWide Telescope, Virtual Observatory, and Dublin Core practices.

Scientific results and discoveries

Volunteer identifications guided laboratory follow-up at institutions including Lawrence Berkeley National Laboratory, NASA Johnson Space Center, California Institute of Technology, University of Arizona, and Smithsonian Institution that led to confirmation of particle impacts and analyses using instruments at National Synchrotron Light Source, Advanced Light Source, Argonne National Laboratory, and Oak Ridge National Laboratory. Findings informed publications coauthored by researchers from Jet Propulsion Laboratory, University of California, Berkeley, Harvard University, Cornell University, and Caltech. Results contributed to understanding of cometary materials in context with studies from missions like Rosetta (spacecraft), Deep Impact (spacecraft), Giotto (spacecraft), Hayabusa, and OSIRIS-REx. The project also yielded insights relevant to meteoritics research undertaken by teams at Smithsonian Institution's National Museum of Natural History, Natural History Museum, London, American Museum of Natural History, and Muscovite institutions.

Data processing and verification

Image acquisition used microscopes and imaging pipelines operated by Lawrence Berkeley National Laboratory, Stanford University, University of California, Berkeley, Sandia National Laboratories, and National Institute of Standards and Technology. Candidate tracks flagged by volunteers underwent verification by professional researchers at Jet Propulsion Laboratory, NASA Ames Research Center, Lawrence Berkeley National Laboratory, University of California, Santa Cruz, and Smithsonian Institution. Verification combined optical microscopy, scanning electron microscopy at facilities like Oak Ridge National Laboratory and Argonne National Laboratory, and spectroscopy at synchrotron sources including Advanced Photon Source and Advanced Light Source. Cross-validation methods borrowed statistical and machine-learning ideas from groups at Massachusetts Institute of Technology, Microsoft Research, Stanford University, Caltech, and Princeton University to reduce false positives and to prioritize samples for destructive analyses at Johnson Space Center and Lawrence Livermore National Laboratory.

Legacy and impact on citizen science

The project influenced later citizen science and crowdsourcing efforts coordinated by Zooniverse, Citizen Science Alliance, Planet Hunters, Folding@home, SETI Institute, and Galaxy Zoo. It demonstrated models for public engagement used by educational partners such as National Science Teachers Association, Smithsonian Institution, American Museum of Natural History, Science Museum (London), and Museum of Science, Boston. Techniques and community-building practices spread to initiatives at European Space Agency, Japanese Aerospace Exploration Agency, Canadian Space Agency, Australian National University, and South African Astronomical Observatory. The legacy is visible in publications and programs involving NASA, NSF, Gordon and Betty Moore Foundation, Simons Foundation, Smithsonian Institution, Zooniverse, and Citizen Science Alliance that continue to bridge professional research at institutions like Harvard University, Caltech, MIT, University of California, Berkeley, and Jet Propulsion Laboratory with public volunteers.

Category:Citizen science projects