The SPICE data is solar system geometry data maintained by JPL's NAIF. http://naif.jpl.nasa.gov/naif/ Their toolkit for working with the data is extensive, but written in FORTRAN. I have been slowly exploring it and writing a data parser in Go. I don't think I'll have much to show at the end of the hackathon. I'm definitely not out to win anything. But it's fun data!