Our Projects
Build an EarthDial
Specifications for an EarthDial
The measurements and necessary components for a standard EarthDial
How to Build an EarthDial
Step-by-step instructions (also available in PDF format or as a summary in Spanish)
How to Read a Sundial
What time is it?
EarthDial Glossary
Face, furniture, gnomon, gnomonicist, motto, style
EarthDial Calculator
Calculates the locations of the lines on the face of the EarthDial for your latitude
Support our Asteroid Hunters
They are Watching the Skies for You!
Our researchers, worldwide, do absolutely critical work.
Asteroid 2012DA14 was a close one.
It missed us. But there are more out there.
Save Our Science
Become a Space Advocate
We are at a crucial turning point in the history of planetary exploration.
You can help.
Together, we can get the budget we need to support our planetary endeavors and Save our Science.
We've done it before. Let's do it again.
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