This Day In Astro History

explorer 9
Explorer 9

calculating dark matter
Calculated Dark Matter

February 16

2011 - Analysing infrared images taken by Herschelís SPIRE (Spectral and Photometric Imaging Receiver) instrument Herschel is showing us that we donít need quite so much dark matter as we thought to trigger a starburst.

1961 - Explorer 9 (S-56a) a 7-kilogram (15 lb), 3.7-metre (12 ft) balloon which was deployed into a medium Earth orbit to study the density and composition of the upper thermosphere and lower exosphere is launched.

1948 - Uranus's moon Miranda is discovered by Gerard Kuiper

1786 - Francois Arago's birthday, pioneer scientist in the wave nature of light and the inventor of the polarimeter and other optical devices. His theory of light predicted that the velocity of light should decrease as it passes into a denser medium.
2012 - Russian Space Walk on ISS
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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 ††