Monday, 10 February 2014

Astronomy Scrapbook Tuesday 11th February 2014

Eye in the Sky
February 11th about 20.00 hrs Occultation of a star by the Moon




At about 20.00 hrs as seen from the center of the UK the Moon will pass in front of  or occult the 3rd magnitude star Lambda Gemini. The star will vanish for about 30 minutes before re appearing. Times will vary slightly in different locations.

On This Day (1)
February 11th 1868 death of Jean Bernard Leon Foucault.

Jean Bernard Leon Foucault (1819-1868)




Foucault was a French physicist best know for his demonstration of the Foucault Pendulum a device for demonstrating the effect of the rotation of the Earth.

Foucault Pendulum


On This Day (2)
February 11th 1942
The beginning of the Channel Dash. Did the Sun Play its Part?


In 1942 the two German battle cruisers Scharnhorst and Gneisenau successfully ran the gauntlet of the Royal Air Force and Royal Navy to safely reach Germany in an operation called Cerberus. Radar on both sides had problems each thinking the other side was jamming their systems, however the Sun was very active and flares hitting the Earth could have caused problems with the radar.



The route of Operation Cerberus February 11th-13th 1942



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