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Most Visible Planets 2019 space apps 2019 skywatch 2019 Planets Most Visible

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Curious facts about cosmic life and their inhabitants.

"Titan is a very active moon. We already know that about its geology and exotic hydrocarbon cycle. Now we can add another analogy with Earth and Mars: the active dust cycle, in which organic dust can be raised from large dune fields around Titan's equator," Dr. Sebastien Rodriguez explained in a September 24, 2018 NASA Jet Propulsion Laboratory (JPL) Press Release. Dr. Rodriguez is an astronomer at the Universite Paris Diderot, France, and the paper's lead author. The JPL is in Pasadena, California.



and here is another

Titan: Titan, the tormented, hydrocarbon-slashed largest moon of Saturn--and the second largest moon in our Solar System, after Ganymede--could possess a subsurface, salty ocean that may well be as salty as the Dead Sea on Earth. The salty water could begin approximately 31 to 62 miles beneath Titan's icy shell, according to recent estimates. Meanwhile, on Titan's smog enshrouded surface, "life as we do not know it" could swim in alien lakes and rivers that flow with liquid methane and ethane hydrocarbons--instead of water.



and finally

The rifts themselves are buried far, far down, deep beneath dark volcanic plains on the near-side of our Moon and have been spotted only in the gravity data provided by GRAIL. The lava-flooded rift valleys are not like anything seen anywhere else on the lunar surface--but some planetary scientists think that they may have, at one time, long ago, resembled rift zones on our own planet, Venus, and Mars. The new findings are published in the October 1, 2014 issue of the journal Nature.

More information:

Dr. Sotin and Dr. Vance are both members of the Icy Worlds team at JPL, which is part of the multi-institutional NASA Astrobiology Institute based at Ames Research Center in Moffett Field, California.



Titan has a radius that is about 50% wider than Earth's Moon. It is approximately 759,000 miles from its parent-planet Saturn, which itself is about 886 million miles from our Sun--or 9.5 astronomical units (AU). One AU is equal to the average distance between Earth and Sun, which is 93,000,000 miles. The light that streams out from our Star takes about 80 minutes to reach Saturn. Because of this vast distance, sunlight is 100 times more faint at Saturn and Titan than on Earth.



First launched as GRAIL A and GRAIL B in September 2011, the two probes, playfully dubbed Ebb and Flow, operated in an almost-circular orbit near the lunar poles at an altitude of about 34 miles until their mission concluded in December 2012. The distance between the twin probes altered slightly as they flew over areas of lesser or greater gravity that resulted from visible features--such as craters and mountains--as well as by hidden masses secreted beneath our Moon's surface.