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Early Observations, from Telescopes to Spacecraft: Ancient Astronomers / Modern Tools

Color image of statues
Abu Simbel (Credit: Sun-Earth Day)
Black and white image of telescope
Ritchey's Reflector (Credit: CalTech)
Illustration of MESSENGER spacecraft
MESSENGER Spacecraft (Credit: NASA)

For More Information...

About Stonehenge in England:

About the solar alignments at El Karnak in Egypt:

About the Big Horn Medicine Wheel in Wyoming:

About Jantar Mantar in India:

About Chichen Itza in Mexico:

About Gaocheng in China:

Eyes on the Sky: 400 Years of Telescope Development
This seven-part series of vodcasts produced for the 2009 International Year of Astronomy offer an excellent explanation of the evolution of telescopes.

Telescopes from the Ground Up
Explore the history of telescopes, from Galileo to NASA's Great Observatories.

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Last Updated: 12 Sep 2014