Greeks Astronomy Worksheets mythology of the planets powerpoint solar system ppt Worksheets Astronomy Greeks

Greeks Astronomy Worksheets mythology of the planets powerpoint solar system ppt Worksheets Astronomy Greeks

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Interesting facts about space.

After a long and dangerous journey through the space between planets, the Cassini/Huygens Spacecraft reached Saturn on July 1, 2004. On December 25, 2004, the Huygens Probe was purposely liberated from the Cassini Orbiter. Huygens then began its historic descent through the dense blanket of golden-orange fog to at last lift the veil hiding Titan's long-hidden face.

and here is another

The scientists also ruled out the possibility that the mysterious features actually exist on Titan's surface in the form of frozen methane rain or icy lava erupted from cryovolcanoes. Such surface features would show a different chemical signature and would be visible for much longer periods of time than the bright features observed in this study. The bright features were visible from time spans of only 11 hours to five weeks.

and finally

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.

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On July 20, 1969, astronaut Neil Armstrong radioed back from the surface of the Moon, "... the Eagle has landed". Most of us believe that the landing occurred as broadcast. Not all, however. More than 30 years after the fact, Fox TV aired "Conspiracy Theory: Did We Really Go to the Moon?". In doing so, the Fox entertainers unleashed a lively cabal of kooks and NASA-bashers on a scientifically naive audience without benefit of editorial balance. Polls suggest that perhaps 6% of Americans believe in the authenticity of these claims.

NASA's future exploration of ocean worlds is enhanced by HST's monitoring of Europa's possible plume activity and Cassini's long-term observations of the plume of Enceladus. In particular, the investigations of both ocean worlds are providing the groundwork for NASA's Europa Clipper mission, which is planned for launch in the 2020s.

"Hydrogen is a source of chemical energy for microbes that live in the Earth's oceans near hydrothermal vents. Our results indicate the same chemical energy source is present in the ocean of Enceladus. We have not found evidence of the presence of microbial life in the ocean of Enceladus, but the discovery of hydrogen gas and the evidence for ongoing hydrothermal activity offer a tantalizing suggestion that habitable conditions could exist beneath the moon's icy crust," explained Dr. Hunter Waite in an April 13, 2017 Southwest Research Institute (SwRI) Press Release. Dr. Waite is principal investigator of Cassini's Ion Neutral Mass Spectrometer (INMS), and lead author of the paper titled Cassini Finds Molecular Hydrogen in the Enceladus Plume: Evidence for Hydrothermal Processes. The SwRI is in San Antonio, Texas.