As the Rosetta spacecraft remains in orbit around the comet 67P/Churyumov-Gerasimenko, the comet is slowly drifting toward its closest approach to the Sun, known as perihelion.  As the comet moves closer to the Sun, intense sunlight liberates gases and dust in streams of material that form clearly visible streaks.  The orbiter is able to sample some of the material liberated from the comet, and for the first time it has seen the tell-tale signature of Molecular Nitrogen. Nitrogen is abundant on Earth as a gas, constituting the majority of our atmosphere.  It is also present in the atmospheres of Pluto and Neptune’s...