This Day In Astro History




Craters on Ganymede
Craters on Ganymede

arthur c clarke
Arthur C. Clarke
Happy Birthday!

December 16

2015 - Hubble releases the image of the first-ever predicted supernova explosion. "The detection of Refsdal's reappearance served as a unique opportunity for astronomers to test their models of how mass — especially that of mysterious dark matter — is distributed within this galaxy cluster."

2000 - Using scientific data gathered by the Jupiter explorer spacecraft  Galileo's  on May 20th of  Ganymede, JPL scientists announce evidence of an ice capped, salty ocean. Ganymede,  the solar system's largest moon, now joins Callisto and Europa as moons of Jupiter that probably have seas of liquid water under ice. "We have now, after months and months of wrestling with the data, reached a point where we feel confident that there is a layer of water under Ganymede’s icy surface." said Margaret Kivelson, a University of California, Los Angeles planetary scientist and the principal investigator for Galileo’s magnetometer.

1965 - Pioneer 6 launched into solar orbit between Venus and Earth.

 

Birthdays

1969 - Birthday, Adam Riess, in Washington, DC who shared the 2011 Nobel Prize in Physics for providing evidence of an expanding and accelerating universe.

1917 - Birthday, Arthur C. Clarke, life long proponent of space travel, author, futurist. (d. 2008)

1857 - Birthday, Edward Emerson (E.E.) Barnard, American observational astronomer with many discoveries, but best known for his discovery of Barnard's Star, named in his honor. (d. 1923)

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It is my conclusion that human evolution and the motions of matter in space are intrinsically linked. The observation and understanding of the complexity of biological history on Earth cannot be complete without the tandem observation and understanding of a dynamic greater cosmos. - SpaceGene