Wednesday 18 September 2019

Demonstration of the Rotation of the Earth

Comet the Cat, Mr Shrodinger's Roof and the Stars in and around the 'celestial north pole'. Polaris is the bright star to the right and above the TV aerial 
"Last night we tested Jolene's latest 'dew zapper' by undertaking an automated two hour long imaging run, The Canon 600d DSLR was tripod mounted and aimed North in the direction of our neighbour Mr. Shrodinger's house. The camera was programmed to take 15 second exposures at ISO 800 with an interval of one minute between each exposure. The relative humidity and temperature at the Observatory was recorded as 85% and 11 degrees Celsius respectively. When the camera lens was inspected after 2 hours of operation there was no sign of condensation. The dew zapper (and electrical battery) had exceeded their calculated design performance parameters.
Pip Stakkert spent some time today in the 'Observatory Media Studio' making a time-lapse film from the 'still images' obtained over night. The film demonstrates the rotation of the Earth and the principle of relativity. With our feet firmly anchored in the dirt our frame of reference is provided by the Earth, so when the Earth rotates we perceive the stars as rotating about the Earth's axis of rotation." - Kurt Thrust acting CEO and current Director of the Jodrell Plank Observatory.



Star Trails around Polaris - Credit: Kurt Thrust

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