Pluto’s unexpected surface and moons
The New Horizons mission team reported several unusual findings concerning Pluto this week at the 47th Annual Meeting of the Division for Planetary Sciences (DPS) of the American Astronomical Society (AAS). Among the biggest was the discovery of two large and distinct mountains that New Horizons geologists think could be recently active “cryovolcanoes”. So-called cryovolcanoes are thought to spew a semi-frozen slurry of water ice, nitrogen or other gases instead of fire, smoke and lava […]
Rosetta spacecraft observes brightest jet from Comet 67/P
The European Space Agency (ESA) reports that on July 29 the Rosetta spacecraft observed the brightest and largest eruption from Comet 67P/Churyumov–Gerasimenko to date. Several of the spacecraft’s instruments took measurements from a distance of 116 miles (186 km) and the results were very interesting. The Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) detected double the amount of carbon dioxide, quadruple the methane, and seven times the hydrogen sulfide detected just a couple […]
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