The ESA's Rosetta spacecraft recently discovered the presence of molecular nitrogen on Comet 67P/Churyumov-Gerasimenko.
The availability of molecular nitrogen during the formative stages of the solar system is important to theories about the origins of the gas planets. Temperatures must have decreased as low as -220ºC and conceivably even as low as -250ºC for the particles to end up in ice.
138 estimations by the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis instrument (ROSINA) were examined.
This model supports the hypothesis that Jupiter comets may not have been the source for nitrogen on the Earth.