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पुरालेख:
Materiales complementarios
Material complementario
Telescope in the pocket
Making your own sky disk
Form the armillary sphere to the astrolabe
The pyrenean shepherd’s dials
Building simple sundials
Latitude Gnomon and Guadrant for the Whole Year
Making helioscopes with four sticks
The eight planets
A 1 Kilometer “Ball Drop” On Solar System Bodies
Practical astronomy videos
To Scale: The Solar Sistem
Sky Lights
Gaia Video
NASA education programs
NASA’s Science Mission Directorate
NASA Wavelength
Photographs of the ISS
Re-transmision of the total solar eclipse (13/11/12)
Eye on the Sky
StarDate
McDonald Observatory
Solar Folklore
Astronomical Society of the Pacific
The Center for Arquaeoastronomy
Exploring the Cosmos
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