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类似的网站 Moonstick.Com
Moonstick Co. - manual visual calculators for astronomy, timekeeping, and computation
描述: Moonstick Co. is the designer and manufacturer of manual visual calculators for astronomy, timekeeping, and computation
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语: English
网站主题: astronomy
The Master Clock for the United States.
网站评级:
3.0 / 5.0, 语: English
General information, FAQ, tour information, history, equipment information, inexpensive digital astro imaging, and instructions on constructing an 8 inch Dobsonian.
网站评级:
3.0 / 5.0, 语: English
NASA Moon images with captions showing different phases, suitable for printing and classroom display.
网站评级:
3.0 / 5.0, 语: English
This site is intended for students in grades K through 8.
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3.0 / 5.0, 语: English
Custom Pins
网站评级:
3.0 / 5.0, 语: English
Search the world's information, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for.
网站评级:
4.5 / 5.0, 语: English
PNAS. Beginning January 2002, PNAS research articles and papers published online before print in PNAS Early Edition are available only to paid subscribers for six ...
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4.4 / 5.0, 语: English