Ptolemaic Solar System ptolemaic solar system Ptolemaic Solar System

Ptolemaic Solar System ptolemaic solar system Ptolemaic Solar System

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A little interesting about space life.

How did Triton acquire so many strange properties, and why is Neptune's system of satellites so different from those predicted for a gaseous giant planet? Two planetary scientists, Dr. Raluca Rufu (Weizmann Institute of Science, Israel) and Dr. Robin Canup (Southwest Research Institute, US) demonstrate how Triton wreaked catastrophic havoc on Neptune's first generation of very unfortunate moons.



and here is another

Of the hundreds of bewitching moons in our Sun's family, Titan is remarkable for being the only one boasting a dense atmosphere and large liquid reservoirs on its surface, rendering it in many ways more like the four rocky, terrestrial planets of the warm and well-lit inner Solar System. Indeed, both Earth and Titan possess atmospheres dominated by nitrogen--more than 95 percent nitrogen in Titan's case. However, unlike our Earth, Titan's atmosphere has very little oxygen; the remainder of its atmosphere is primarily composed of methane and trace quantities of other gases--such as ethane. At the truly frigid temperatures found at the Saturn system's great distance from our Sun, Titan's methane and ethane can exist on the surface in their liquid form.



and finally

There probably are many more lakes under Europa's ice, Blankenship continued to note. Furthermore, the prospects of searching for life on Europa could greatly improve. This is because research indicates that a percentage of the icy lids that cover the embedded lakes may be considerably thinner than was previously supposed.

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Our Moon is Earth's only permanent natural satellite. It is also the largest moon in our Solar System relative to the size of its host planet. Second only to Jupiter's volcanic Galilean moon, Io, our Moon is the densiest natural satellite among those whose densities have been determined.



"The distribution of these water-rich deposits is the key thing. They're spread across the surface, which tells us that the water found in the Apollo samples isn't a one-off. Lunar pyroclastics seem to be universally water-rich, which suggests the same may be true of the mantle," Dr. Milliken continued to explain in the Brown University Press Release.



This new method is based on the fact that elements composing our planet's crust that have a tendency to combine with iron--such as iridium and platinum--arrived at Earth after this last giant collision.