On this day in 1958, the U.S. Congress passes legislation establishing the National Aeronautics and Space Administration (NASA), a civilian agency responsible for coordinating America’s activities in space. NASA has since sponsored space expeditions, both human and mechanical, that have yielded vital information about the solar system and universe. It has also launched numerous earth-orbiting satellites that have been instrumental in everything from weather forecasting to navigation to global communications (source)
Cassini Spacecraft Reveals 101 Geysers on Icy Saturn Moon
Scientists using mission data from NASA’s Cassini spacecraft have identified 101 distinct geysers erupting on Saturn’s icy moon Enceladus. Their analysis suggests it is possible for liquid water to reach from the moon’s underground sea all the way to its surface.
Over a period of almost seven years, Cassini’s cameras surveyed the south polar terrain of the small moon, a unique geological basin renowned for its four prominent “tiger stripe” fractures and the geysers of tiny icy particles and water vapor first sighted there nearly 10 years ago. The result of the survey is a map of 101 geysers, each erupting from one of the tiger stripe fractures, and the discovery that individual geysers are coincident with small hot spots. These relationships pointed the way to the geysers’ origin.
Thanks to recent analysis of Cassini gravity data, the researchers concluded the only plausible source of the material forming the geysers is the sea now known to exist beneath the ice shell. They also found that narrow pathways through the ice shell can remain open from the sea all the way to the surface, if filled with liquid water.
The fact that Enceladus’ sea is salty, laced with organic compounds, spouting into space, and maybe even rising up to the surface has raised this particular Saturnian moon as a major target for future exploration.
An officially licensed full-size replica of the extra-terrestrial creature from the 1979 20th Century Fox film Alien, one of a limited edition of 100 made by Hollywood Collectibles Group from the original production moulds used to create the alien costume for the film, designed by H. R. Giger