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What Asteroid Killed the Dinosaurs do we know what killed the dinosaurs astrobiology magazine What Killed Dinosaurs the Asteroid

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A Distant, Dusty Moon. Titan experiences changing seasons--just like Earth. In particular, Titan's seasons change around the equinox, when our Sun passes Titan's equator. At this time, huge clouds can form in tropical areas, resulting in violent methane storms. Cassini observed these ferocious methane storms during several of its flybys over Titan.



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Enceladus: Enceladus has shown geysers of water that were confirmed by the Cassini spacecraft in 2005. Gravimetric data obtained from 2010 to 2011 confirmed the existence of a subsurface ocean. Even though originally it was thought to be localized, most likely in a region of the icy moon's southern hemisphere, evidence collected in 2015 indicates the subsurface ocean is actually global. Furthermore, in additon to water, these geysers from vents located near the south pole of Enceladus contain tiny quantities of salt, nitrogen, carbon dioxide, and volatile hydrocarbons. Tidal flux from Saturn is apparently responsible for the melting of the ocean water, as well as the geysers.



and finally

Additional modeling showed that the strange features must be atmospheric--but nevertheless close to Titan's surface--probably creating a very thin layer of tiny solid organic particles. Because they are located directly above the dune fields surrounding Titan's equator, the only possible explanation left is that these mysterious spots are really clouds of dust churned up from the dunes.

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When one thinks of Italy they think of picturesque countryside, ancient ruins, incredible history, scrumptious food, style and elegance. They do not often think about the very practical and functional original Moon Boot. In actual fact, Tecnica first designed Moon Boots in the early seventies and the fact that they still remain in production today is testament to the valued niche they have in the market.



Determining the shape of the moon's orbit will help resolve the question of its mysterious origin. A tight circular orbit would indicate that MK 2 is likely the result of a collision between Makemake and another KBO. Conversely, if the moon is in a wide, elongated orbit, it is more likely to be a captured object from the Kuiper Belt. In either case, the event would have probably occurred several billion years ago, in our primeval Solar System.



"We believe that the Huygens Probe, which landed on Titan in January 2005, raised a small amount of organic dust upon arrival due to its powerful aerodynamic wake. But what we spotted here with Cassini is at a much larger scale. The near surface wind speeds required to raise such an amount of dust as we see in these dust storms would have to be very strong--about five times as strong as the average wind speeds estimated by the Huygens measurements near the surface and with climate models," Dr. Rodriguez added.