New Horizons Upper Limits on O${}_2$ in Pluto's Present Day Atmosphere

J. A. Kammer, S. A. Stern, G. R. Gladstone +5

The surprising discovery by the Rosetta spacecraft of molecular oxygen (O${}_2$) in the coma of comet 67P/Churyumov-Gerasimenko (Bieler et al. 2015) challenged our understanding of t…