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?
Face, furniture, gnomon, gnomonicist, motto, style
Calculates the locations of the lines on the face of the EarthDial for your latitude
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.