This is a chronicle of teaching Earth System Science and Educational Technology at NMU. http://www.nmu.edu
Friday, September 27, 2013
Its like Stellarium before the interwebs
http://www.lawrencehallofscience.org/starclock/skywheel.html
A planisphere is a star chart analog computing instrument in the form of two adjustable disks that rotate on a common pivot. It can be adjusted to display the visible stars for any time and date. It is an instrument to assist in learning how to recognize stars and constellations. The astrolabe, an instrument that has its origins in the Hellenistic civilization, is a predecessor of the modern Planisphere. http://en.wikipedia.org/wiki/Planisphere
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