Young Astronaut Program 1988 the young astronaut medal program quotamerica in space Program Young Astronaut

Young Astronaut Program 1988 the young astronaut medal program quotamerica in space Program Young Astronaut

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Curious facts about cosmic life and their inhabitants.

"We developed new operations methods for INMS for Cassini's final flight through Enceladus' plume. We conducted extensive simulations, data analyses, and laboratory tests to identify background sources of hydrogen, allowing us to quantify just how much molecular hydrogen was truly originating from Enceladus itself," explained Dr. Rebecca Perryman in the April 13, 2017 SwRI Press Release. Dr. Perryman is INMS operations technical lead.



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The very productive Cassini mission might attain some indirect information by analyzing the ring arc material--however, it is unlikely to come close to the little moon again before the mission ends in 2017.



and finally

Since its discovery centuries ago, Ganymede has been the target of a great deal of well-deserved attention from the planetary science community. Earth-bound telescopes have gazed at Ganymede's puzzling, icy surface and, in later decades, flyby space missions and spacecraft, circling around Jupiter, have scrutinized Ganymede--trying to solve its numerous mysteries. These observations ultimately unveiled a complicated, icy moon-world, whose bizarre surface showed a strange and puzzling contrast between its two main types of terrain: the dark, extremely ancient and heavily cratered surface terrain, and the much younger--but still ancient--lighter terrain showing a vast array of mysterious grooves and ridges.

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"Confirmation that the chemical energy for life exists within the ocean of a small moon of Saturn is an important milestone in our search for habitable worlds beyond Earth," commented Dr. Linda Spilker in the April 13, 2017 NASA Press Release. Dr. Spilker is Cassini project scientist at NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California.



Popular culture has tried to extract maximum leverage out of the mysterious symbolism associated with the full moon. Modern fables have produced creatures like the were-wolf, an otherwise normal man who apparently becomes a wolf when the moon is full. A full moon has strong suggestions of pure and predominantly platonic, love.



The most widely accepted scenario, explaining our Moon's mysterious and ancient birth, is termed the Giant Impact Theory. According to this theory, Earth's Moon was born as the result of a gigantic collision between our still-forming planet and a primordial Mars-sized protoplanet that has been named Theia. The tragedy that was the doomed Theia probably had an orbit that crossed Earth's--making such a catastrophic collision difficult to avoid. It is thought that the impacting Theia hit our planet hard, but swiped it with a glancing blow at precisely the right angle. In fact, Theia came very close to bouncing off Earth, but was swallowed instead. The blast dispatched shock waves across our ancient planet, hurling debris and gas screaming into space. For a short time, Earth had a ring around it that was composed of this ejected material.