Blogs about any natural satellite.

Ancient volcanic deposits on the Moon (Image courtesy Milliken lab / Brown University)

An article published in the journal “Nature Geoscience” describes a research that provides evidence of the existence of large amounts of water in ancient volcanic deposits on the Moon. Ralph E. Milliken and Shuai Li of Brown University used data collected by the Chandrayaan-1 space probe’s Moon Mineralogy Mapper Spectrometer to locate the water, perhaps formed after the collision between a planet and the primordial Earth that led to the Moon’s formation.

Maps of Pluto and Charon (Image NASA/JHUAPL/SwRI/LPI)

On the occasion of the second anniversary of the New Horizons space probe’s Pluto flyby, NASA has published a map of the dwarf planet and its largest moon, Charon. The American Space Agency has also created two videos that partially reproduce that flight concentrating one on Pluto and one on Charon. They provide a truly unique perspective, giving the impression of being on board a spaceship flying by those celestial bodies.

2007 OR10 and its moon (Image NASA, ESA, C. Kiss (Konkoly Observatory), and J. Stansberry (STScI))

An article published in “The Astrophysical Journal Letters” describes the discovery of a moon of the 2007 OR10 transnettunian object. It’s most likely a dwarf planet which is still little known because right now it’s distant from the Sun about 87 times the Earth. A team of astronomers led by Csaba Kiss of the Konkoly Observatory in Budapest analyzed images of the Hubble Space Telescope’s archive finding two images of 2007 OR10’s moon.

Plumes on Europa (Image NASA, ESA, W. Sparks (STScI), and the USGS Astrogeology Science Center)

Yesterday, NASA held a press conference to explain the latest news about the studies of alien oceans. The attention was focused on the two most popular underground oceans, the one in Jupiter’s satellite Europa and the one in Saturn’s satellite Enceladus. There are confirmations of plumes from Europa, also described in an article published in “The Astrophysical Journal Letters”. The presence of molecular hydrogen in the Enceladus ocean was announced, also described in an article published in the journal “Science”.

Enceladus with some tiger stripes in blue (Image NASA/JPL/Space Science Institute)

An article published in the journal “Nature Astronomy” describes the discovery that the south pole of Enceladus, one of the planet Saturn’s moons, is warmer than expected under the icy surface. A team of researchers led by Alice Le Gall of LATMOS and UVSQ studied detections carried out by the Cassini space probe during a flyby in 2011 concluding that the underground ocean on Enceladus is closer to the surface than previously thought.