Galileo Solar System Project galileo galilei39s solar planet model sciencing System Solar Galileo Project

Galileo Solar System Project galileo galilei39s solar planet model sciencing System Solar Galileo Project

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Interesting facts about space.

However, weeks before New Horizons' scheduled arrival at its main target, it managed to reveal some strange secrets long-held in the deep freeze of our Solar System's outer limits. For their new study, released in June 2015, a team of planetary scientists collected all available NASA and European Space Agency (ESA) Hubble Space Telescope (HST) data on the four outer moons of Pluto in order to study this strange system in greater depth. Their observations reveal that at least a duo of Pluto's moons are not rotating on their axes in an orderly manner at all, but are instead in chaotic rotation while circling Pluto and its large companion moon, Charon--a moon-world that weighs-in at a hefty 11% of Pluto's mass. Charon is commonly thought to have once been a part of Pluto itself, before it was blasted off in a catastrophic collision with another object billions of years ago. The new study also suggests that one of the mystery moons has a bizarre jet-black coloring of unknown origin and composition. These truly amazing results appear in the June 4, 2015 issue of the journal Nature.



and here is another

Like Earth's own large Moon, Triton is locked in synchronous rotation with its planet--one side always faces Neptune. However, because of Neptune's odd orbital inclination, both of the moon's polar regions take turns facing the Sun. Spacecraft images of Triton reveal mounds and round pits formed from icy lava flows (cryovolanism), as well as smooth volcanic plains. The surface of the moon is only sparsely cratered, indicating that its surface is new--that is, it is constantly being resurfaced, probably by the "lava" flow from icy volcanoes. Triton is very bright--its fresh, sparkling, new ice-coating is believed to cover a heart of metal and rock. Triton's high density suggests that it contains more rock in its interior than the icy moons of Saturn and Uranus.



and finally

However, this did not prove to be the case. Instead, Cassini's measurements did not suggest any great difference in temperature between the surrounding shore and the methane sea over this span of time. This finding indicates that the terrains surrounding the lakes and seas on Titan are wet with liquid hydrocarbons, which would cause them to warm up and cool down in much the same way as the methane sea itself.

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Over the passage of billions of years, this ceaseless rain of falling objects have pulverized the lunar surface, creating fragments ranging in size from a fine powder to enormous, heavy boulders. Almost the entire lunar surface is literally blanketed by a pile of ground up rubble composed of charcoal gray, powdery dust and rocky debris collectively termed the lunar regolith. Beneath the regolith there is a region composed of shattered bedrock that is called the megaregolith.



Our Moon's temperature reaches about 260 degrees Fahrenheit when under a full Sun. However, in darkness, the temperature dives down to approximately -280 degrees Fahrenheit.



The new study was published in the April 3, 2014 issue of the journal Nature, and it may provide a solution to a long-standing mystery of lunar origins pertaining to why Earth and its lovely companion appear to sport virtually identical compositions.