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If the authors' proposal is correct, then it successfully explains why Neptune's moon system looks so strange compared to Jupiter's or Saturn's--which means that astronomers' models of how these primordial systems form around gaseous giant worlds still hold strong.
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"That thermally emitted radiation happens at the same wavelengths that we need to use to look for water. So in order to say with any confidence that water is present, we first need to account for and remove the thermally emitted component," Dr. Milliken continued to explain in the July 24, 2017 Brown University Press Release.
In addition to shedding new light on the lunar water-mystery, the new research could also have important implications for future exploration of Earth's Moon. The volcanic beads do not harbor a lot of water--only about.05 percent by weight--but the deposits are large, and the water could potentially be extracted.
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Earlier research had determined the quantity of material accreted onto the ancient Earth following the Moon-forming collision. These previous calculations were based on how the siderophile or "iron-loving" elements such as platinum and iridium show a strong tendency to wander down into our planet's core. Following each giant impact that the primordial Earth experienced, these elements would have leached from Earth's mantle and bonded with iron-rich, heavy material that was destined to travel down, down, down into our planet's heart.
Mars was born a few million years after the formation of our Solar System, while Earth took much longer. If Venus formed on a timeline similar to that of Mars, then that would be a "huge puzzle" since Venus and Earth are so similar in terms of mass and orbit," Dr. Jacobson explained in the April 2, 2014 National Geographic News.
Asphaug and co-author Dr. Andreas Reufer of the University of Bern in Switzerland, devised their new giant impact model using sophisticated computer simulations. They discovered that mergers between moons the size of Jupiter's Galilean satellites--which range in size from 1,940 miles wide (Europa) to 3, 271 miles across (Ganymede)--would tear icy stuff off the outer layers of the colliding moons. This icy material would then form spiral arms, which would ultimately merge together due to gravitational attraction to create Saturn's mid-sized icy moons.